Hepatitis D is a liver infection caused by the hepatitis D virus, and it only occurs in people who also have hepatitis B. Early symptoms of Hepatitis D can include tiredness, nausea, belly pain, dark urine, and yellowing of the skin or eyes, but some people feel well at first. Many people first hear about Hepatitis D after abnormal liver blood tests or when hepatitis suddenly becomes more severe. Hepatitis D can be short term or long lasting, and chronic infection can lead to cirrhosis, liver failure, or liver cancer over time. Treatment may include antiviral medicine such as interferon in selected cases, careful liver monitoring, and treatment of hepatitis B, and severe cases may need a liver transplant.
How many people live with Hepatitis d?
Worldwide, hepatitis D is estimated to affect about 12 million people (WHO, 2024). In the United States, because hepatitis D only occurs in people who also have hepatitis B, CDC's estimate of up to 2.4 million people living with long-term hepatitis B (CDC, 2024) suggests up to about 120,000 people may be living with hepatitis D, but this is an estimate rather than a direct count (WHO, 2024).
Overview
Hepatitis dSymptoms
Hepatitis D often causes tiredness, nausea, belly pain, dark urine, and yellowing of the skin or eyes. Early symptoms of Hepatitis D can feel like a bad flu, and some people have no symptoms at first.
Outlook and prognosis
For people with hepatitis D, outlook depends largely on how much liver damage is present and whether hepatitis B is well controlled. Without treatment, hepatitis D can progress faster to cirrhosis, liver failure, or liver cancer, but early specialist care can improve outcomes.
Causes and risk factors
Hepatitis D happens only in people who also have hepatitis B. Risk rises with contact with infected blood or body fluids, especially shared needles or unprotected sex. Living in or traveling to high-rate regions also increases risk.
Genetic influences
Genetics usually are not a main cause of Hepatitis D. In most cases, inherited genetic variations have little known effect, while the virus strain itself may influence how severe Hepatitis D becomes and how it responds to treatment.
Diagnosis
Hepatitis D is diagnosed with blood tests that look for hepatitis D antibodies and viral genetic material, usually in someone who already has hepatitis B. Liver tests and sometimes ultrasound help show how much damage is present.
Treatment and drugs
Treatment for Hepatitis D focuses on controlling the virus and protecting the liver. Pegylated interferon may help some people, though treatment can be long and side effects are common. Liver checks, avoiding alcohol, and treating hepatitis B are also important.
Symptoms
Hepatitis D often affects energy and digestion before anything else feels obviously wrong. Many people feel unusually tired, lose their appetite, or notice stomach upset, while others do not have symptoms right away. Symptoms vary from person to person and can change over time. When symptoms do appear, the early symptoms of hepatitis D can look a lot like other liver problems, with yellowing of the eyes or skin, dark urine, and pain under the ribs on the right side.
Feeling wiped out is one of the most common symptoms. Day to day, it can feel like ordinary tasks such as working, shopping, or climbing stairs take much more effort.
Food may seem unappealing, and some people feel full quickly. In hepatitis D, this often comes with nausea or vomiting, especially during a new infection or a flare of liver inflammation.
A dull ache or tenderness can happen in the upper right side of the belly, where the liver sits. This can happen in hepatitis D when the liver is inflamed, and some people notice it more after meals or when pressing on the area.
The whites of the eyes may turn yellow before the skin does. Jaundice is one of the more noticeable signs of hepatitis D and happens when the liver has trouble clearing a yellow waste product called bilirubin.
How people usually first notice Hepatitis d?
People usually first notice hepatitis D when symptoms of liver inflammation begin, often with unusual tiredness, nausea, poor appetite, pain or discomfort on the right side of the upper belly, dark urine, or yellowing of the skin or eyes called jaundice. Sometimes the first signs of hepatitis D are easy to miss because they can feel like a bad viral illness, and some people have no clear symptoms at first, especially early on. In many cases, hepatitis D is first found when blood tests done for hepatitis B or abnormal liver tests show a problem, since hepatitis D only occurs in people who also have hepatitis B.
Types of Hepatitis d
Hepatitis D can affect day-to-day life in different ways, from a short illness that feels like the flu to a longer-lasting infection that slowly damages the liver. Doctors usually describe the main types of hepatitis D by how and when the virus appears alongside hepatitis B. The balance of symptoms can shift over time, and some people have few symptoms at first while others become sick quickly.
Coinfection
This happens when hepatitis B and hepatitis D are caught at the same time. Symptoms often come on like an acute hepatitis illness, with fatigue, nausea, belly pain, dark urine, or yellowing of the skin and eyes. Many people recover from this form, although some become very unwell in the short term.
Superinfection
This happens when hepatitis D infects someone who already has long-term hepatitis B. It often causes a sharper change in how someone feels, such as suddenly worse tiredness, loss of appetite, jaundice, or swelling, and it is one of the more serious types of hepatitis D. Compared with coinfection, it is much more likely to turn into a chronic infection and lead to faster liver damage.
Chronic hepatitis D
This means the infection lasts over time instead of clearing after the early illness. Some may find symptoms are mild at first, such as low energy or vague discomfort on the right side of the upper belly, while others develop signs of worsening liver disease. In advanced cases, people with chronic hepatitis D may notice fluid buildup in the abdomen, easy bruising, confusion, or more persistent jaundice.
Can I slow down the onset of symptoms?
There is no good evidence that lifestyle changes can meaningfully delay the start of symptoms from hepatitis D, a liver infection that only happens in people who also have hepatitis B. The clearest proven step is to reduce the chance of getting hepatitis D in the first place by preventing hepatitis B with vaccination and by avoiding contact with infected blood or body fluids; if you already have hepatitis D, avoiding alcohol, staying at a healthy weight, and getting regular liver care may help limit liver damage, but they do not reliably prevent or delay symptoms. Early follow-up with a liver specialist is important because regular monitoring and, for some people, antiviral treatment may help slow liver injury, and while this cannot promise a certain outcome, it can still support better long-term liver health.
What genetics can tell you about symptoms
For people living with hepatitis D, genetics usually cannot tell doctors exactly which symptoms you will have or when they will start. Symptoms and severity are driven more by how much liver inflammation and damage the infection causes, whether hepatitis B is also active, and other health factors, although some inherited differences in the immune system may slightly affect how strongly the body reacts and how quickly liver disease worsens. In practice, genetic testing is not a standard way to predict day-to-day symptoms in hepatitis D.
Causes and risk factors
Hepatitis D happens when the hepatitis D virus infects someone who already has hepatitis B. The main risk factor for hepatitis D is having hepatitis B, because this virus needs hepatitis B to survive and spread. Common risk factors for hepatitis D include sharing needles, sex without condoms, and tattoo, piercing, or medical equipment that is not sterile. Risk is also higher in places where hepatitis B is common and in people who have frequent blood exposure, such as those on kidney dialysis. Hepatitis D is not an inherited condition, and knowing the risks can help you feel more in control.
What are the most common causes or risk factors?
Hepatitis D happens only in people who already have hepatitis B, so the biggest risk factor is having a hepatitis B infection. It spreads through contact with infected blood or other body fluids, most often through sharing needles or other drug equipment, sex without a condom with an infected partner, or using unclean tattoo, piercing, or medical equipment. Risk is also higher for many living in places where hepatitis B is more common, for people on kidney dialysis, and for those who live with or have close contact with someone who has hepatitis B.
Environmental and biological risk factors
Hepatitis D is a liver infection that can happen only in people who also have hepatitis B. Some risks are carried inside the body, others come from the world around us. Knowing the main risk factors for hepatitis D infection can help you understand when testing may be worth discussing with your doctor.
Hepatitis D can develop only if hepatitis B virus is also present. Risk is highest in people already living with chronic hepatitis B, because hepatitis D can join that infection later.
Contact with blood carrying hepatitis B or D is a major environmental risk. This can happen through nonsterile needles, syringes, tattoo or piercing tools, or blood products that were not safely screened.
Living closely with someone who has hepatitis B or D can raise risk if blood-contaminated items are shared. Razors, toothbrushes, nail tools, and glucose-testing equipment can all carry tiny amounts of blood.
Repeated dialysis, needlestick injuries, or medical care in places with poor infection control can increase exposure risk. This is especially relevant where sterile equipment or blood screening is limited.
Genetic risk factors
Hepatitis D is not known to be caused by inherited gene changes. It develops only in people who also have hepatitis B, because the hepatitis D virus needs hepatitis B to spread in the body. When people ask about genetic risk factors for hepatitis D, the main point is that routine care does not use inherited DNA testing to predict who will get it. Research is ongoing, but no single gene has a proven major role in causing hepatitis D.
No inherited cause: Hepatitis D is not known to come from a single gene change passed down from parent to child. For most people, genetic testing is not used to explain why hepatitis D occurs.
Hepatitis B needed: Hepatitis D can only affect people who already have hepatitis B or get both infections at the same time. This makes hepatitis B the key biological risk factor for hepatitis D, rather than family genes.
Family history: Having a relative with hepatitis D does not usually mean you inherited the condition. In most families, hepatitis D does not follow a hereditary pattern the way some genetic disorders do.
Genes under study: Researchers are looking at whether small differences in genes that help control the immune system might affect how strongly the body reacts to infection. So far, no gene finding is reliable enough to predict the early symptoms of hepatitis D or to guide routine screening.
Lifestyle risk factors
Lifestyle can influence both the chance of acquiring hepatitis D and how much liver damage develops over time. Because hepatitis D affects a liver already vulnerable to hepatitis B, habits that increase blood or sexual exposure and habits that strain the liver matter most. When people ask about lifestyle risk factors for hepatitis D, the main concerns are alcohol use, drug-related exposure, sexual behavior, weight-related metabolic stress, and inconsistent medical follow-up.
Regular or heavy alcohol intake can speed liver inflammation, scarring, and progression to cirrhosis in people with hepatitis D. Avoiding alcohol is one of the most important ways to reduce added liver injury.
Sharing needles, syringes, or other drug equipment can increase the risk of acquiring hepatitis D in people exposed to hepatitis B. Ongoing injection drug use can also make treatment adherence and liver monitoring more difficult.
Unprotected sex with multiple partners can raise the chance of hepatitis B and therefore hepatitis D transmission. Using barrier protection and reducing high-risk sexual exposure can lower this risk.
Excess body weight, insulin resistance, and a diet high in ultra-processed foods can add fatty liver disease to hepatitis D. This extra metabolic stress may worsen liver inflammation and fibrosis.
Risk prevention
For hepatitis D, prevention mostly means avoiding hepatitis B, because hepatitis D can only infect people who already have hepatitis B. If you live with hepatitis B, reducing contact with infected blood and body fluids becomes especially important. Prevention can mean both medical steps, like vaccines, and lifestyle steps, like exercise.
The hepatitis B vaccine is the main way to prevent hepatitis D in people who do not already have hepatitis B. By blocking hepatitis B, it also blocks hepatitis D from taking hold.
Using condoms and limiting exposure to blood during sex can lower the risk of hepatitis D, especially for people with hepatitis B. This matters because hepatitis D spreads through infected blood and some sexual contact.
Never share needles, syringes, or other drug equipment, even once. Sharing these items is one of the highest-risk ways to spread hepatitis D and hepatitis B.
Do not share razors, toothbrushes, nail tools, or anything that may have small amounts of blood on it. Tiny blood exposure can be enough to pass hepatitis D in some situations.
Can you prevent Hepatitis d?
In many cases, yes, hepatitis D can be prevented, but there is no separate vaccine just for it. The best way to prevent it is to prevent hepatitis B, because hepatitis D can only spread in people who also have hepatitis B, so getting the hepatitis B vaccine and lowering exposure to blood or body fluids, such as by not sharing needles and using condoms, can greatly reduce the risk.
Transmission
Hepatitis D spreads only when the virus enters the body through infected blood or certain body fluids, and it can only infect people who already have hepatitis B. In everyday life, this usually means sharing needles or other drug equipment, having sex without protection, or exposure to unsterile medical, tattoo, or piercing tools; this is the main answer to how hepatitis D spreads.
Hepatitis D is not passed by hugging, coughing, sneezing, sharing food, or other casual contact. It is less contagious than infections that spread through the air, but it can spread efficiently when blood-to-blood contact happens, so the risk is highest with direct exposure to infected blood.
When to test your genes
For hepatitis D, genetic testing is not part of routine early detection. What matters is timely blood testing if you have hepatitis B, abnormal liver tests, liver scarring, or exposure risk, because hepatitis D can only occur with hepatitis B. In some cases, your care team may use specialized tests to guide treatment, but not usually gene tests.
Diagnosis
Hepatitis D is usually suspected when someone has signs of hepatitis, abnormal liver blood tests, or known hepatitis B infection. Because hepatitis D can only infect people who also have hepatitis B, testing for both viruses is a key part of the diagnosis of hepatitis D. It’s natural to worry when symptoms don’t have a clear explanation.
Doctors ask about past or current hepatitis B, possible blood or sexual exposure, travel, and any symptoms such as fatigue, nausea, or yellowing of the eyes. A detailed family and health history can help, but exposure history is usually more important than family history for hepatitis D.
A clinician looks for signs of liver irritation, such as jaundice, abdominal tenderness, swelling, or easy bruising. The exam cannot confirm hepatitis D on its own, but it helps show how much the liver may be affected.
Blood tests check liver enzymes and bilirubin to see whether the liver is inflamed or injured. These results help show severity, but they do not by themselves tell which hepatitis virus is causing the problem.
Doctors usually begin by confirming hepatitis B, since hepatitis D cannot occur without it. Blood tests look for hepatitis B surface antigen and other markers to show whether the infection is new or long-standing.
How is Hepatitis d diagnosed?
Hepatitis D is diagnosed with blood tests, usually in someone who already has hepatitis B, because hepatitis D can only happen along with hepatitis B. Doctors look for signs that your body has seen the virus and may also do a test that checks whether the virus is still active in the blood. They often add liver blood tests, and sometimes a liver scan or ultrasound, to see how much the liver has been affected.
Stages of Hepatitis d
Hepatitis D does not have defined progression stages. That is because it is usually described by the type of infection and how long it lasts, rather than by a steady step-by-step decline over time. Doctors usually start with a conversation about symptoms, risk factors, and whether there has also been hepatitis B, since Hepatitis D can only occur alongside that infection. It is usually diagnosed and monitored with blood tests that look for the virus and signs of liver inflammation, and the early symptoms of Hepatitis D can be mild or easy to miss.
Outlook and prognosis
The outlook for hepatitis D depends heavily on whether it occurs as a coinfection with hepatitis B or as a superinfection in someone who already has chronic hepatitis B, with superinfection generally carrying a worse prognosis. Chronic hepatitis D often causes more rapid liver damage than hepatitis B alone and is associated with a higher risk of cirrhosis, liver failure, and hepatocellular carcinoma. Without effective control of viral activity, many patients progress to advanced liver disease within years, although the pace varies by age, liver status, alcohol use, and access to treatment. Mortality is largely driven by complications of end-stage liver disease and liver cancer, so survival is best when the infection is diagnosed early and monitored by a liver specialist. Newer antiviral approaches and, in selected cases, liver transplantation can improve outcomes, but long-term prognosis remains serious for people with untreated or advanced disease. Preventing hepatitis B, maintaining regular follow-up, and avoiding further liver injury are key factors that improve the hepatitis D prognosis.
Long-term effects
Hepatitis D can have serious long-term effects because it tends to speed up liver damage, especially when it occurs with hepatitis B. For many, this can mean years of inflammation that slowly scars the liver and raises the risk of liver failure or liver cancer. Long-term effects vary widely, with some people staying stable for a time while others get worse more quickly. Thinking about the long-term effects helps explain why regular follow-up is so important.
Ongoing inflammation from Hepatitis D can lead to heavy scarring of the liver, known as cirrhosis. As scar tissue builds up, the liver has a harder time doing everyday jobs like filtering blood and making key proteins.
In some people, Hepatitis D can damage the liver enough that it can no longer work properly. This may cause jaundice, confusion, easy bleeding, fluid buildup, and other signs of decompensated liver disease.
Hepatitis D raises the long-term risk of liver cancer, especially in people who already have cirrhosis. Doctors often watch for this with regular blood tests and liver imaging over time.
Scarring can increase pressure in the vein system that carries blood through the liver. This can lead to an enlarged spleen, swollen veins in the food pipe, and fluid in the belly.
How is it to live with Hepatitis d?
Living with hepatitis D can feel unpredictable: some days are quiet, while others are shaped by deep fatigue, nausea, abdominal discomfort, or the mental weight of knowing your liver needs close attention. In daily life, many people living with hepatitis D need regular blood tests and clinic visits, may need to avoid alcohol and be cautious with medicines that can strain the liver, and sometimes have to pace work, exercise, or social plans when energy is low. It also affects people around you, because partners, family, and close friends may help with appointments and emotional support, and because hepatitis D spreads only alongside hepatitis B through blood and certain body fluids, loved ones may need hepatitis B testing, vaccination, and practical steps to lower exposure.
Treatment and drugs
Hepatitis D treatment focuses on slowing the virus, protecting the liver, and managing the hepatitis B infection that hepatitis D depends on. The main medicine used for Hepatitis D has been pegylated interferon, a long-acting immune treatment given over months, but it does not work for everyone and can cause side effects such as flu-like symptoms, low mood, and fatigue. In some places, especially in Europe, a newer drug called bulevirtide may be offered, particularly for people with ongoing liver inflammation, while care for hepatitis B and regular liver monitoring remain an important part of treatment. Not every treatment works the same way for every person, so doctors may follow blood tests and liver scans over time to see whether treatment is helping and whether cirrhosis or liver failure is developing. For many living with Hepatitis D, treatment also means avoiding alcohol, checking all medicines for liver safety, and in advanced disease, being assessed for a liver transplant.
Can you cure Hepatitis d?
There is no sure cure for hepatitis D, especially when it becomes a long-term infection. In some people, treatment can help the virus become undetectable or even clear, but this does not happen for everyone. Even when it is not cured, treatment and regular follow-up can slow liver damage, lower the risk of serious scarring, and also address the linked hepatitis B infection.
Non-drug treatment
Day-to-day care for hepatitis D often focuses on protecting the liver and catching problems early. Alongside medicines, non-drug therapies can help lower extra strain on the liver, support energy and nutrition, and guide decisions about advanced care when needed. For many, treatment begins not at the pharmacy, but with practical steps like avoiding alcohol, keeping follow-up visits, and managing other health issues that can worsen liver damage. The right plan depends on how much scarring is already present and whether hepatitis D is causing cirrhosis or liver failure.
Avoiding alcohol is one of the most important non-drug steps because alcohol can speed up liver damage in people with hepatitis D. Even small amounts may matter when the liver is already inflamed.
Eating regularly and getting enough protein and calories can help if hepatitis D causes poor appetite, weight loss, or muscle loss. A dietitian can tailor meals if nausea, fluid buildup, or advanced liver disease makes eating harder.
Reaching and maintaining a healthy weight can reduce extra stress on the liver, especially if fatty liver or diabetes is also present. Simple routines—like walking or choosing less processed food—can have lasting benefits.
Gentle physical activity can help maintain strength, mood, and stamina when fatigue makes daily life feel smaller. You may need to try more than one strategy to balance movement with rest, such as shorter walks, planned breaks, and a steady sleep schedule.
Your genes may have an impact on how drugs work for you
For people living with hepatitis D, your genes can sometimes affect how strongly your body responds to medicine or how likely you are to have side effects, because they can change how the body breaks down and uses treatment. In day-to-day terms, this may mean one person feels worn out or gets less benefit from a medicine, while another does better on the same treatment. Still, for hepatitis D, gene-based prescribing, also called pharmacogenomics, is not yet a routine part of care, so treatment choices are usually guided more by how well the liver is working, how active the infection is, and how someone responds over time.
Pharmacological treatments
Treatment for Hepatitis D can be more limited than for some other viral liver infections, so care is often centered on a few specialized options. The main medicines used for chronic Hepatitis D are pegylated interferon alfa and, in some countries, bulevirtide. Some people with Hepatitis D also need hepatitis B medicines such as tenofovir or entecavir, because the D virus depends on hepatitis B to keep going. Not everyone responds to the same medication in the same way.
Pegylated interferon alfa is a long-acting immune-based treatment that has been used for chronic Hepatitis D for many years. It is usually given as an injection over months, and it may help lower virus activity, although it does not work for everyone. Side effects can include flu-like symptoms, low mood, and blood count changes, so close follow-up is important.
Bulevirtide is a newer medicine that blocks the virus from entering liver cells, which can help control chronic Hepatitis D. It is approved in parts of Europe for some adults with compensated liver disease, but availability differs by country and it has not been standard access everywhere. For many living with Hepatitis D, this has become an important option in treatment for chronic hepatitis D when it is available.
Tenofovir and entecavir are hepatitis B medicines that do not directly clear the D virus, but they are often used when hepatitis B is also active. This can help protect the liver and is especially important if hepatitis B levels are high or there is cirrhosis. Sometimes medicines are taken short-term (acute treatment), while others are used long-term (maintenance therapy).
Lonafarnib, sometimes used with ritonavir, has been studied as a possible treatment for Hepatitis D but is not yet a standard approved option in many places. In some cases, it may be available through specialist centers or clinical trials. Doctors may also study combinations of newer drugs to improve results.
Genetic influences
For many living with hepatitis D, the bigger question is often not whether it is inherited, but why some people get much sicker than others. Hepatitis D itself is not passed down through families like an inherited condition; it is a viral infection that can happen only in people who also have hepatitis B. Genetics is only one piece of the puzzle, but small inherited differences in the immune system may help explain why one person controls the infection better while another develops more inflammation, liver scarring, or even liver failure. These gene differences do not cause hepatitis D on their own, and family history usually matters far less than exposure to the virus, hepatitis B status, alcohol use, and other strain on the liver. Researchers are still studying whether certain gene patterns raise the risk of severe hepatitis D or faster cirrhosis, so genetic testing is not a routine part of care for most people with hepatitis D.
Is Hepatitis d genetic?
Genetics usually are not a main cause of Hepatitis D. In most cases, inherited genetic variations have little known effect, while the virus strain itself may influence how severe Hepatitis D becomes and how it responds to treatment.
Having a genetic risk is not necessarily a diagnosis
Genetic variants are a common, normal feature of human biology across the general population. Most do not directly affect health and simply contribute to natural differences among people. For many genes, having a variant associated with a condition suggests a possible link, not a certain diagnosis, particularly when several genes and environmental influences play a role. In some situations, though, one well-understood variant in a particular gene is enough to confirm the diagnosis.
Pharmacogenetics—how genetics influence drug effects
Treatment for hepatitis D can feel less straightforward than treatment for many other infections, partly because there are only a few approved options and people do not all respond the same way. Even so, genetic testing is not a routine part of choosing hepatitis D treatment today. For most people with hepatitis D, doctors choose treatment based more on liver health, hepatitis B activity, other medical conditions, and which medicines are available, rather than on inherited gene results. Genetics is only one factor, and in hepatitis D its role in everyday prescribing is still limited; for example, research has looked at whether immune-related gene differences might affect response to interferon, but this has not led to standard tests used in clinic. If you are wondering how genetics affect hepatitis D treatment, the short answer is that genes may play a small part, but they do not yet guide care in the way they do for some other medicines.
Interactions with other conditions
People living with hepatitis D often feel much sicker when they also have hepatitis B, because hepatitis D can only infect someone who already has hepatitis B and together they can damage the liver faster. Day-to-day, it can feel like one health issue amplifies the other, especially if fatigue, nausea, belly swelling, or jaundice suddenly worsen during a flare. Hepatitis D also matters alongside other liver conditions, such as hepatitis C, alcohol-related liver disease, or fatty liver disease, since these can add to scarring and raise the chance of cirrhosis, liver failure, or liver cancer. People with HIV may have a harder course as well, because coinfection can make liver disease progress more quickly and can complicate treatment choices. Some may find that the early symptoms of hepatitis D are easy to confuse with another liver problem, which is why blood tests and regular follow-up are important. If you have hepatitis D, it is especially important for your care team to look at the whole picture, including other infections, liver conditions, and any medicines that could affect the liver.
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 Hepatitis d?
The symptoms of hepatitis D, such as feeling very tired, nausea, pain on the right side of the belly, dark urine, and yellowing of the skin or eyes, can also happen with other liver problems. The main conditions doctors may need to rule out are hepatitis B, hepatitis C, and sometimes hepatitis A, as well as alcohol-related liver disease, fatty liver disease, liver irritation from medicines, and gallbladder problems such as gallstones.
History
For many people, the story of hepatitis D begins with a confusing illness pattern: someone already living with hepatitis B suddenly becomes much sicker, with more jaundice, fatigue, belly discomfort, or signs of faster liver damage. That pattern pushed researchers to look more closely, because it did not fully fit what they expected from hepatitis B alone.
In 1977, researchers identified a new viral marker in some people with severe hepatitis B, which led to the recognition of hepatitis D, also called delta hepatitis. At first, doctors understood it mainly through these unusually serious cases, especially in parts of Southern Europe, the Mediterranean region, the Middle East, Africa, and South America, where clusters were reported. Early reports showed that hepatitis D was not a completely separate infection in the usual sense; it appeared alongside hepatitis B, which helped explain why some people became ill so quickly while others did not.
Over time, descriptions became clearer as blood testing improved and public health programs expanded. Researchers learned that hepatitis D can happen either at the same time as hepatitis B or in someone who already has long-term hepatitis B, and that the second situation often carries a higher risk of cirrhosis and liver failure. This helped doctors better recognize the early symptoms of hepatitis D and separate them from other forms of viral hepatitis.
In recent decades, awareness has grown as better lab methods made it easier to detect hepatitis D and estimate how many people may be affected worldwide. Understanding also shifted from seeing it as a rare curiosity to recognizing it as an important cause of serious liver disease in some communities, including among migrants from higher-prevalence regions and people with ongoing risk of blood exposure. Knowing this history helps explain why testing for hepatitis D matters in people with hepatitis B: the condition was hidden for years, not because it was unimportant, but because it was harder to spot.