Parkinsonism can make everyday movement slower and harder, so walking, getting dressed, or using your hands may take more effort. It is a group of movement problems that often includes tremor, stiffness, slowness, and trouble with balance. Not everyone will have the same experience, but parkinsonism usually develops over time and is most often recognized in older adults, though it can happen earlier. Treatment depends on the cause and may include medicines that improve movement, physical therapy, and speech or occupational therapy. Life expectancy with parkinsonism varies widely because some causes are milder and others are more serious, so early symptoms of parkinsonism should be assessed by a clinician.
How many people live with Parkinsonism?
There is no single recent worldwide count for parkinsonism as a whole, because parkinsonism is a broad term that includes Parkinson's disease and several other less common movement conditions, and estimates change depending on which causes and diagnostic rules are included. The same is true in the United States, so a single up-to-date global or U.S. total for people living with parkinsonism is not consistently reported by one standard source.
Overview
ParkinsonismSymptoms
Parkinsonism often causes slowness, stiffness, and a resting tremor. Many living with Parkinsonism also notice balance problems, smaller handwriting, or a softer voice. Early symptoms of Parkinsonism can make walking, buttoning clothes, or getting out of a chair harder.
Outlook and prognosis
Parkinsonism usually changes slowly over time, but the outlook varies widely by cause, age, and how quickly symptoms progress. Many people with parkinsonism live for years with treatment, therapy, and support that can ease movement problems and help protect daily independence.
Causes and risk factors
Parkinsonism can result from brain diseases, certain medicines, repeated small strokes, head injury, or toxin exposure. Risk rises with older age. Family history and male sex may also increase risk, while smoking and caffeine links are inconsistent.
Genetic influences
Genetics can matter in Parkinsonism, but they are only one part of the picture. Some people have inherited gene changes that raise risk or shape how Parkinsonism starts, while many cases happen without a clear genetic cause.
Diagnosis
Parkinsonism is diagnosed through a medical history and neurological exam, looking at movement changes such as tremor, stiffness, and slowness. There is no single test, but brain imaging or blood tests may help rule out other causes.
Treatment and drugs
Treatment for Parkinsonism usually combines medication, physical therapy, and speech or swallowing support. Some people also benefit from occupational therapy, regular exercise, and fall-prevention steps at home. Care is tailored to symptoms and the cause.
Symptoms
Parkinsonism can make everyday movements feel slower, stiffer, and less automatic, so getting out of a chair, buttoning a shirt, or starting to walk may take more effort. Some people notice a resting tremor, while others mainly have changes in walking, balance, or speech. The early symptoms of Parkinsonism often build gradually, and symptoms vary from person to person and can change over time. Because several conditions can cause parkinsonism, the exact pattern is not the same for everyone.
Movements can become unusually slow, and starting a step, reaching for something, or turning in bed may take extra effort. Everyday tasks like dressing, bathing, or rising from a chair often take longer than they used to.
Muscles may feel tight or rigid, sometimes causing aching in the neck, shoulders, back, or limbs. This stiffness can limit range of motion and make the body feel less flexible.
A shaking movement often starts in one hand, foot, or the jaw when that body part is relaxed. It may ease during active movement, and not everyone with parkinsonism has a tremor.
Steps may become short and shuffling, and the feet can seem to stick to the floor for a moment. This can be most noticeable when starting to walk, turning around, or moving through a doorway.
How people usually first notice Parkinsonism?
People usually first notice parkinsonism in small, easy-to-miss ways: a hand that trembles at rest, one arm that does not swing normally while walking, handwriting that becomes smaller, or movements that feel slower and stiffer than before. Many living with parkinsonism are first told something seems off because their face looks less expressive, their voice grows softer, or everyday tasks such as buttoning clothes, getting up from a chair, and turning in bed start taking more effort. These first warning signs of parkinsonism often begin gradually and on one side of the body, which is why they can be mistaken at first for normal aging, stress, or an old injury.
Types of Parkinsonism
Parkinsonism can affect daily life in different ways, from slower walking and stiffness to changes in balance, speech, or facial expression. In medical terms, the main types of Parkinsonism are called primary, atypical, and secondary, which describe different causes and symptom patterns. Symptoms don’t always look the same for everyone. Knowing the types of Parkinsonism can help explain why some people mainly develop tremor, while others notice early falls, memory changes, or a poor response to standard Parkinson’s medicines.
Primary Parkinsonism
This usually refers to Parkinson’s disease, the most common form of parkinsonism. Symptoms often begin gradually on one side of the body, with tremor, slowness, stiffness, or a reduced arm swing. Many people respond well, especially early on, to medicines that replace or mimic dopamine.
Atypical Parkinsonism
This is a group of less common conditions that cause parkinsonism but often bring additional problems early, such as frequent falls, eye movement trouble, marked blood pressure drops, or early memory and thinking changes. Symptoms may progress faster than in Parkinson’s disease, and standard Parkinson’s medicines often help less. Common examples include multiple system atrophy, progressive supranuclear palsy, and corticobasal syndrome.
Secondary Parkinsonism
This happens when parkinsonism is triggered by something else, such as certain medications, repeated head injury, strokes, or exposure to toxins. The symptom pattern can be more mixed, and tremor may be less prominent than stiffness and slowness. If the underlying cause can be found and treated, symptoms sometimes improve.
Can I slow down the onset of symptoms?
Usually no, not in a proven way: for parkinsonism, there is no well-established lifestyle change or medical treatment that has been shown to reliably delay when symptoms first begin. Research suggests that regular physical activity, good sleep, and keeping blood pressure, blood sugar, and other heart and blood vessel risks under good control may support brain health and may be linked to a lower risk or later onset in Parkinson disease, but this is much less clear for parkinsonism as a group and does not mean it can be prevented. There is no standard preventive medicine, but it is worth reviewing your medicines with a clinician because some drugs can cause parkinsonism or make it worse, and while healthy habits are still a good idea, they cannot promise a later onset.
What genetics can tell you about symptoms
Genetics can sometimes help explain why parkinsonism looks different from one person to another, including which movement problems show up, whether symptoms start younger or later in life, and how quickly they may change over time. In some inherited forms, certain gene changes are linked with patterns such as more stiffness and slowness, more tremor, earlier onset, or added symptoms like trouble with balance, memory, mood, or the automatic body functions that control things like blood pressure and bladder function. Even so, genes are only part of the picture, so genetic results usually suggest tendencies rather than predict exactly which symptoms someone will have or how severe they will be.
Causes and risk factors
Parkinsonism often happens when brain cells that make dopamine are damaged, and this can occur in Parkinson's disease, other brain diseases, or small strokes. Some cases are drug-induced Parkinsonism and happen after certain antipsychotic or nausea medicines. Older age is one of the strongest risk factors, and men are affected a bit more often than women. Family history and some gene changes can raise risk, but having a gene change doesn't mean you'll definitely develop the condition. Exposure to pesticides or solvents and repeated head injuries from work or sports may also raise risk.
What are the most common causes or risk factors?
Parkinsonism is most often caused by Parkinson's disease, but it can also happen because of certain medicines, especially some used for mental health conditions or nausea, as well as other brain problems such as repeated small strokes or less common illnesses that affect movement and balance. The biggest risk factor is older age, and risk can also be higher in people with a close family history, meaning an inherited tendency may play a part. In some people, long-term exposure to pesticides or other toxic chemicals may also raise the risk.
Environmental and biological risk factors
Parkinsonism is more likely in some settings than others, especially later in life or after certain brain or chemical exposures. Doctors often group risks into internal (biological) and external (environmental). These risk factors for parkinsonism do not mean someone will definitely develop symptoms, but they help explain why movement changes happen in some people and not others.
Parkinsonism becomes more common with aging. Over time, the brain’s movement circuits can become more vulnerable to damage and disease.
Some medicines that block dopamine signals, especially certain antipsychotic and anti-nausea drugs, can trigger parkinsonism. Symptoms may ease if the medicine is reduced or changed, although recovery is not always complete.
Strokes and long-term small blood vessel disease can damage deep brain areas that help control movement. This can lead to a form called vascular parkinsonism.
A severe head injury or repeated blows to the head can increase later risk. The link is stronger when injuries are serious or happen more than once.
Genetic risk factors
For some people, Parkinsonism is linked to inherited gene changes that affect how nerve cells handle proteins, energy, and chemical signaling. A strong family history can raise the chance that genes are involved, especially if symptoms start younger than usual. Carrying a genetic change doesn’t guarantee the condition will appear. Different genes can lead to similar movement problems, which is one reason genetic testing is sometimes discussed.
Family history: Having close relatives with Parkinson disease or parkinsonism can make a genetic cause more likely. This matters even more when symptoms begin at a younger age or several family members are affected.
LRRK2 changes: Changes in the LRRK2 gene are one of the most common known inherited causes of Parkinson disease with parkinsonism. Not everyone who carries one of these changes develops symptoms, so risk can vary within the same family.
GBA1 changes: Changes in GBA1 do not always directly cause parkinsonism, but they can raise the chance of developing Parkinson disease and related movement symptoms. Many people with a GBA1 change never develop the condition, and the course can differ from person to person.
PRKN changes: Changes in PRKN are linked to inherited parkinsonism that often starts earlier in adult life. Symptoms may begin slowly, and many living with this form respond well to standard Parkinson treatments.
PINK1 or DJ-1: Changes in PINK1 or DJ-1 are rarer inherited causes of parkinsonism, usually when both copies of the gene are affected. They are more often considered when early symptoms of parkinsonism start young or run in a family.
SNCA or VPS35: Rare changes in SNCA or VPS35 can cause inherited forms of Parkinson disease with parkinsonism. These gene changes are uncommon, but they can strongly suggest a genetic cause when multiple generations are affected.
Lifestyle risk factors
Parkinsonism is usually not caused by lifestyle habits, but daily routines can meaningfully affect symptom control, mobility, and complication risk. When people ask about lifestyle risk factors for Parkinsonism, the more useful question is often how lifestyle affects Parkinsonism over time. Factors such as exercise, nutrition, sleep, stress, and substance use can influence balance, stiffness, fatigue, swallowing, and overall function. Good lifestyle support works best alongside medical care and rehabilitation.
Too little physical activity can lead to faster loss of strength, flexibility, balance, and walking ability in people with parkinsonism. Regular movement and targeted exercise may help preserve mobility and reduce falls.
Inadequate protein, low calorie intake, or an unbalanced diet can worsen weight loss, frailty, constipation, and low energy in parkinsonism. Good nutrition supports muscle function and may make daily activities easier to manage.
Low fluid intake can worsen constipation, dizziness, confusion, and low blood pressure, which are common problems in parkinsonism. Better hydration and bowel-friendly habits may reduce discomfort and help medication routines work more smoothly.
Irregular or poor-quality sleep can intensify daytime sleepiness, concentration problems, mood symptoms, and fatigue in parkinsonism. A steadier sleep routine may improve daytime function and coping.
Risk prevention
There is no guaranteed way to prevent parkinsonism, because it can have different causes and some are not fully understood. For many people, prevention is more about lowering risk where possible and avoiding things that can bring on parkinsonism or make it worse. Prevention can mean both medical steps, like reviewing medicines and treating underlying conditions, and lifestyle steps, like exercise. In day-to-day life, this may mean staying active, protecting your head, and talking with a doctor early if early symptoms of parkinsonism start to appear.
Some medicines can cause drug-induced parkinsonism, especially certain antipsychotic and anti-nausea drugs. Do not stop a prescribed medicine on your own, but ask your doctor whether a safer alternative is possible if movement symptoms begin.
Long-term exposure to some pesticides, solvents, and other industrial chemicals may raise the risk of some forms of parkinsonism. Using protective equipment at work and following safety rules can help lower avoidable exposures.
Repeated head injuries may increase the chance of later movement problems, including parkinsonism in some people. Seat belts, helmets, and fall prevention during sports or daily activities can help protect the brain.
Ongoing physical activity supports brain and blood vessel health and may help lower risk factors linked to some types of parkinsonism. Aim for a routine you can keep, such as walking, cycling, strength work, or balance exercises.
Can you prevent Parkinsonism?
Parkinsonism usually cannot be fully prevented, because it often happens for reasons people cannot control. That said, some causes may be partly avoidable by protecting your head from repeated injuries, avoiding harmful chemicals, managing conditions like high blood pressure and diabetes to lower stroke risk, and checking with a doctor if a medicine seems to be causing shaking or stiffness. These steps may lower risk for some people, but they cannot guarantee prevention.
Transmission
If someone close to you has Parkinsonism, you can safely hug them, share meals, and live together without worrying about catching it. Parkinsonism is not contagious, so it does not spread through the air, by touch, through sex, or through food and drink.
In most people, Parkinsonism is not passed directly from parent to child, although some forms are linked to family history or rare gene changes, so how Parkinsonism is inherited depends on the underlying cause. Overall, Parkinsonism is considered noninfectious, and its person-to-person spread is essentially none.
When to test your genes
Genetic testing for parkinsonism is most useful if symptoms begin unusually early, several relatives are affected, or the pattern looks atypical, because those clues raise the chance of an inherited cause. For most people with later-onset, typical parkinsonism, routine gene testing is not needed, but it can sometimes help guide family counseling or research trial options.
Diagnosis
Parkinsonism is usually diagnosed by piecing together symptoms, a physical exam, and tests that help rule out other causes. For many, the first step comes when everyday activities start feeling harder, such as taking longer to button a shirt or noticing a softer voice and smaller handwriting. The diagnosis of parkinsonism often starts with a careful review of when symptoms began, how they have changed, and whether they affect one side of the body more than the other.
Doctors ask about tremor, stiffness, slowness, balance problems, sleep changes, and constipation, because these can offer early clues. They also review when symptoms started, how quickly they progressed, and whether certain medicines or past illnesses could explain them.
A clinician watches how you walk, turn, stand up, and use your hands. They check for slowness of movement, muscle stiffness, tremor at rest, and changes in reflexes or eye movements that may point toward a specific cause.
Some drugs, especially certain antipsychotic or anti-nausea medicines, can cause symptoms that look like parkinsonism. Blood work and other lab tests may help rule out common conditions that can worsen movement symptoms, such as thyroid problems or liver disease.
A standard MRI does not confirm parkinsonism, but it can help rule out stroke, normal pressure hydrocephalus, tumors, or other brain conditions. In some cases, imaging findings also suggest an atypical parkinsonian disorder rather than Parkinson disease itself.
How is Parkinsonism diagnosed?
Parkinsonism is diagnosed mainly from a careful review of symptoms, a physical and nerve exam, and your medical history, because there is no single blood test that confirms it. Doctors look for a pattern such as slowness of movement, stiffness, shaking, and balance problems, and they may also use brain scans or other tests to rule out stroke, medication side effects, or other causes; sometimes they look at whether symptoms improve with Parkinson's medicine. Genetic testing is not needed for most people, but it may be offered if symptoms start young or there is a strong family history.
Stages of Parkinsonism
Parkinsonism does not have defined progression stages. That is because parkinsonism is a group of movement symptoms rather than one single illness, and the course can vary a lot depending on the cause. Doctors usually start with a conversation about when symptoms began, such as slowing down, stiffness, tremor, balance trouble, or other early symptoms of parkinsonism, and how these changes affect daily life. It is usually monitored with repeat exams over time, and some people may also need brain imaging or other tests to look for the most likely cause.
Outlook and prognosis
Outlook in parkinsonism varies widely because it depends on the underlying cause, how quickly symptoms progress, and how well a person responds to treatment. Idiopathic Parkinson disease often progresses slowly over many years, and many people live for decades with good symptom control, while atypical or secondary forms of parkinsonism usually decline faster and may lead to earlier disability. Over time, problems with balance, swallowing, speech, cognition, and autonomic function can become more prominent and increase the risk of falls, aspiration pneumonia, and loss of independence. Mortality is often related less to tremor or stiffness themselves than to complications such as infections, fractures after falls, cardiovascular events, or severe swallowing difficulty. Early diagnosis, physical activity, rehabilitation, careful medication management, and attention to mood, sleep, and nutrition can meaningfully improve quality of life and help preserve function.
Long-term effects
Over time, parkinsonism can affect movement, speech, swallowing, thinking, sleep, and day-to-day independence. The long-term picture is often different from one person to the next, because outcomes depend on the cause of parkinsonism, age, overall health, and how symptoms change over time. Some people have a slow course over many years, while others develop disability more quickly.
Slowness, stiffness, balance problems, and trouble getting started can gradually make walking, dressing, and getting out of a chair harder. For many, symptoms fluctuate during the day, and falls become a bigger risk over time.
Speech may become softer, less clear, or more monotone, which can make everyday conversations tiring and frustrating. Many living with parkinsonism also notice reduced facial expression, so others may miss how they are feeling.
Chewing and swallowing can become slow or uncoordinated, especially later in the course of parkinsonism. This can lead to coughing during meals, weight loss, dehydration, or food and liquid going into the lungs.
Some people develop slower thinking, trouble with planning, memory changes, depression, anxiety, or apathy. Doctors may track these changes over years to see whether they stay mild or begin to interfere with work, finances, or daily routines.
How is it to live with Parkinsonism?
Living with parkinsonism often means moving through the day more slowly and with more effort, as stiffness, tremor, balance problems, and softer speech can turn ordinary tasks like dressing, walking, eating, or getting out of a chair into repeated challenges. Many people also deal with fatigue, sleep trouble, constipation, pain, or changes in mood and thinking, so the condition can affect far more than movement. For family, friends, and caregivers, this can mean offering more hands-on help, adjusting routines, and learning to communicate with patience, but with treatment, exercise, therapy, and practical home changes, many living with parkinsonism can still preserve meaningful independence and connection.
Treatment and drugs
Parkinsonism is usually treated by easing symptoms and supporting daily function, since care depends on the cause and on which movement problems are most bothersome. Medicines that raise or mimic dopamine, a brain chemical involved in movement, can help with slowness, stiffness, and tremor, while some people also need treatment for sleep problems, constipation, low mood, or blood pressure drops when standing. Treatment plans often combine several approaches, including physical therapy, regular exercise, speech or swallowing therapy, and practical safety changes at home if walking or balance become harder. Not every treatment works the same way for every person, so doctors may adjust medicines over time, and in some cases they may recommend specialist options such as botulinum toxin injections or deep brain stimulation surgery. For many living with parkinsonism, the best plan is the one that helps most with everyday tasks like getting dressed, turning in bed, or walking across a room with more confidence.
Can you cure Parkinsonism?
For many people living with parkinsonism, there is no cure right now. Treatment can often help manage symptoms like stiffness, shaking, and slow movement, and may improve walking, speech, sleep, and day-to-day life through medicine, physical therapy, and other support. In some cases, if parkinsonism is linked to a medicine or another treatable cause, symptoms may get better when that cause is dealt with.
Non-drug treatment
Day-to-day life with parkinsonism can involve slower movement, stiffness, balance problems, softer speech, and trouble with routine tasks like getting dressed or turning in bed. Managing this condition often means building a care plan that supports movement, communication, swallowing, sleep, and safety at home, not just relying on medicine. The best mix depends on the cause and severity of parkinsonism, but many living with parkinsonism benefit from regular therapy, exercise, and practical changes to daily routines.
Physical therapy helps many people with parkinsonism work on walking, balance, posture, and safe transfers like getting out of a chair. A therapist may teach bigger, more deliberate movements and fall-prevention strategies, and physical therapy for parkinsonism is often most helpful when started early and practiced regularly.
Regular exercise can support strength, flexibility, endurance, and confidence with movement. Walking, cycling, tai chi, stretching, and supervised balance work may all help, and not every approach works the same way for everyone.
Occupational therapy focuses on everyday tasks such as dressing, bathing, writing, cooking, and using the bathroom safely. Some non-drug options are delivered by specialists, and an occupational therapist can suggest simpler ways to do tasks plus tools like grab bars, shower seats, or utensils with easier grips.
Speech therapy can help if your voice becomes soft, words come out less clearly, or conversations feel tiring. A speech-language pathologist may use voice exercises and breathing practice, and they can also check for swallowing problems.
Your genes may have an impact on how drugs work for you
For many people living with parkinsonism, the same medicine can help one person a lot but give another person less benefit or more side effects, such as nausea, sleepiness, dizziness, or involuntary extra movements. Part of that difference may come from small inherited changes in the body that can affect how medicines like levodopa are absorbed, broken down, or used by the brain, although age, other health problems, and the exact type of parkinsonism often matter just as much or more. Right now, genetic testing does not guide treatment for most people with parkinsonism in everyday care, but in some cases it may help explain why a medicine seems to work differently or why side effects happen more easily.
Pharmacological treatments
Day-to-day, Parkinsonism can make walking, dressing, writing, and getting out of a chair feel slow or stiff, so treatment usually aims to ease those movement problems. The medicines used for Parkinsonism depend on the cause, but many are chosen to improve slowness, stiffness, tremor, and wearing-off between doses. Not everyone responds to the same medication in the same way. In people searching for medications for parkinsonism, it helps to know that some drugs work best in Parkinson disease, while others are used more selectively or may help certain symptoms more than others.
This is the main medicine for many people with Parkinsonism, especially when slowness and stiffness affect daily life. Levodopa turns into dopamine in the brain, and carbidopa helps more of it reach the brain while reducing nausea. Over time, some may notice shorter benefit from each dose or extra movements called dyskinesias.
Drugs such as pramipexole, ropinirole, and rotigotine can mimic dopamine and may help movement symptoms. They are sometimes used alone early on or added to levodopa later. Sleepiness, swelling, hallucinations, or impulse-control problems can limit their use, especially in older adults.
Selegiline, rasagiline, and safinamide help the brain keep dopamine active for longer. They may give mild symptom relief on their own or help levodopa last longer between doses. Doctors also review other medicines carefully because some combinations can cause harmful interactions.
Entacapone, opicapone, and tolcapone are add-on drugs used with levodopa when benefit starts fading before the next dose. They help each levodopa dose last longer rather than treating Parkinsonism by themselves. Tolcapone is used less often because it can rarely harm the liver and needs close monitoring.
Genetic influences
Parkinsonism can sometimes be linked to inherited gene changes, especially when symptoms begin at a younger age or several close relatives have similar movement problems. It’s natural to ask whether family history plays a role. In most people with parkinsonism, though, genetics is only part of the picture, and age, environmental exposures, and other health factors may also matter. Certain gene changes can raise the chance of developing parkinsonism, while a smaller number can directly cause a rare inherited form. For many living with parkinsonism, this means genetic testing is usually most helpful when there is early-onset disease, an unusual pattern of symptoms, or a strong family history of parkinsonism. A doctor or genetic counselor can help explain whether testing is likely to be useful and what the results may and may not tell you.
Is Parkinsonism genetic?
Genetics can matter in Parkinsonism, but they are only one part of the picture. Some people have inherited gene changes that raise risk or shape how Parkinsonism starts, while many cases happen without a clear genetic cause.
Having a genetic risk is not necessarily a diagnosis
Genetic variants are a normal part of human biology and are commonly found in the general population. Most do not have a direct effect on health and simply represent natural human diversity. For many genes, carrying a variant associated with a condition points to a possible link rather than a definite diagnosis, especially when several genes and environmental factors are involved. In some cases, though, a single well-understood variant in a particular gene can be enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
When tremor, stiffness, or slowness start making everyday tasks like buttoning a shirt or getting out of a chair harder, treatment for Parkinsonism often needs some careful adjustment. Some inherited gene changes can affect the type of parkinsonism someone has and how well symptoms respond to medicines such as levodopa, or how likely side effects are. Genetics is only one factor, though: age, the exact cause of the symptoms, other medicines, and liver and kidney health also help determine which drug and dose may work best. In people with early symptoms of Parkinsonism or a strong family history, genetic testing may help clarify whether the pattern looks more like Parkinson disease or another form of parkinsonism, which can guide treatment planning. Even so, routine pharmacogenetic testing is not yet a standard way to choose Parkinsonism medication, because most gene findings do not clearly point to one best drug. Doctors usually combine symptoms, exam findings, medication response, and sometimes genetic results to tailor treatment over time.
Interactions with other conditions
For many people living with Parkinsonism, day-to-day changes are not always caused by Parkinsonism alone, and another health problem can make movement, sleep, mood, or thinking seem worse. Doctors call it a comorbidity when two conditions occur together. Depression and anxiety are common alongside Parkinsonism, and they can deepen fatigue, reduce motivation, and make it harder to stay active or keep up with treatment. Constipation, bladder problems, and low blood pressure can also interact with Parkinsonism, so someone might feel much more unsteady when standing up, especially if they are dehydrated or taking medicines that lower blood pressure. Memory problems, stroke, arthritis, and neuropathy can add to slowness, stiffness, falls, or trouble with daily tasks, which can make the early symptoms of Parkinsonism harder to sort out. Sleep apnea and other sleep disorders may worsen daytime sleepiness and concentration, while infections such as a urinary tract infection or pneumonia can cause a sudden drop in function or confusion, especially in older adults. Because medicines for other conditions can sometimes increase tremor, sleepiness, or confusion, it is important to review the full medication list with a clinician when symptoms change.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
What other conditions can cause similar symptoms to Parkinsonism?
Symptoms that look like parkinsonism can also happen with Parkinson's disease, a common shaking condition called essential tremor, side effects from certain medicines, and small strokes that affect movement. Doctors may also consider a buildup of fluid in the brain that can cause walking trouble and falls, as well as a few less common brain conditions that affect movement, balance, and eye movements. Because these problems can overlap, the pattern of symptoms, the exam, and a review of medicines are often key to telling them apart.
History
People living with parkinsonism often notice changes that affect ordinary moments first: a hand that does not swing as much when walking, stiffness when getting out of a chair, or movements that seem slower than they used to be. These patterns have been recognized for centuries, although doctors did not always understand that the same group of symptoms could come from more than one underlying condition.
In 1817, an English doctor, James Parkinson, published a careful description of what he called the “shaking palsy,” based on people he had observed in daily life and on the street. He focused on tremor, stooped posture, balance problems, and slowness of movement, helping medicine begin to see parkinsonism as a recognizable syndrome rather than a vague part of aging. Over time, doctors learned that not everyone with parkinsonism has the same symptoms, and not all tremor is parkinsonism.
As medical science evolved, descriptions became more precise. In the late 1800s and early 1900s, neurologists separated Parkinson disease from other movement disorders and linked symptoms to changes in deep parts of the brain involved in movement control. Later research showed that parkinsonism can happen in several settings: as Parkinson disease, as part of other neurologic disorders, or after certain medicines or toxins. That helped explain why some people have early symptoms of parkinsonism that progress slowly over years, while others develop a different pattern.
A major turning point came in the mid-20th century, when scientists discovered the role of dopamine, a brain chemical needed for smooth movement. This led to treatments that could meaningfully ease stiffness, slowness, and tremor for many people, even though they did not cure the condition. In recent decades, brain imaging, pathology studies, and broader awareness have improved diagnosis and deepened understanding of non-movement symptoms such as sleep changes, constipation, mood changes, and thinking problems.
Today, the history of parkinsonism is still being written. Researchers now understand much more about the biology behind these symptoms, including that some forms have a genetic cause, but the condition remains complex and varied. Knowing this history helps explain why diagnosis can take time and why treatment is often tailored to the exact pattern of symptoms each person is experiencing.