Dysbaric osteonecrosis is bone damage linked to repeated exposure to pressure changes, most often in divers and people who work in compressed-air settings. It can affect the long bones near the shoulder and hip, and early symptoms of dysbaric osteonecrosis may include deep joint pain, stiffness, or trouble moving the arm or leg, although some people have no symptoms at first. The condition usually develops over months or years after repeated exposure, and doctors often find it on imaging scans rather than from the physical exam alone. Not everyone will have the same experience. Treatment for dysbaric osteonecrosis focuses on stopping further pressure exposure, easing pain, and managing joint damage, and death from the condition itself is uncommon, though severe cases can lead to lasting disability or joint surgery.
How many people live with Dysbaric osteonecrosis?
There is no recent, widely accepted estimate for how many people live with dysbaric osteonecrosis worldwide or in the United States. This condition is rare and not routinely counted in major public health databases, so global and U.S. numbers are not consistently reported by a single authoritative source.
Overview
Dysbaric osteonecrosisSymptoms
Dysbaric osteonecrosis often causes no early symptoms. When symptoms appear, many living with dysbaric osteonecrosis notice deep, aching pain in the shoulder or hip, along with stiffness and reduced joint movement.
Outlook and prognosis
Dysbaric osteonecrosis often stays stable if pressure exposure stops early, but damaged joints can gradually become stiff and painful over time. Outlook is best with regular monitoring, because hip or shoulder disease may eventually limit movement and sometimes needs surgery.
Causes and risk factors
Dysbaric osteonecrosis is linked to repeated high-pressure exposure followed by decompression, especially in divers and compressed-air workers. Risk rises with longer exposure, prior decompression sickness, frequent pressure changes, smoking, and possibly differences in blood clotting and circulation.
Genetic influences
Genetics do not appear to be a main cause of Dysbaric osteonecrosis. Some genetic variations may slightly affect risk, but pressure exposure and decompression history are thought to matter much more, and genetic testing is not routinely used.
Diagnosis
Dysbaric osteonecrosis is diagnosed using your history of repeated pressure exposure, symptoms, and imaging. X-rays may miss early changes, so MRI often helps more. Diagnosis of dysbaric osteonecrosis can take time because early symptoms are often mild.
Treatment and drugs
Treatment for dysbaric osteonecrosis focuses on protecting damaged bone and easing pain. Many living with dysbaric osteonecrosis may need to stop further pressure exposure, use pain relief and physical therapy, and sometimes have surgery if a joint is badly affected.
Symptoms
Pain with walking, climbing stairs, or lifting overhead is often what brings dysbaric osteonecrosis to attention, especially in the hips or shoulders. The early symptoms of dysbaric osteonecrosis can be easy to miss because some bone changes cause no symptoms at all at first. Symptoms vary from person to person and can change over time. When symptoms do appear, they usually build gradually rather than all at once.
A dull, deep ache in the shoulder or hip is one of the most common symptoms. It may start during activity and ease with rest, then become more frequent over time.
The affected joint can feel tight, especially after resting or first getting moving. Many living with dysbaric osteonecrosis notice that everyday motions, like reaching up or bending down, no longer feel as smooth.
Range of motion may slowly decrease, making it harder to raise an arm, rotate the shoulder, or fully move the hip. What once felt effortless can start to require more energy or focus.
Hip involvement can lead to limping or putting less weight on one side because movement hurts. Day to day, this can feel like avoiding longer walks, stairs, or standing for too long.
How people usually first notice Dysbaric osteonecrosis?
Dysbaric osteonecrosis often stays silent at first, which is why many people do not notice anything until an X-ray or other scan done after repeated work or diving in compressed air shows bone damage. When symptoms do appear, the first warning signs are usually a deep, aching pain in a large joint such as the shoulder, hip, or knee, along with stiffness and reduced range of motion that can slowly make walking, climbing stairs, or lifting your arm harder. Because these symptoms can look like ordinary joint wear and tear, people with dysbaric osteonecrosis may not realize the cause is damage to bone from earlier pressure exposure until medical imaging connects the pattern.
Types of Dysbaric osteonecrosis
Dysbaric osteonecrosis does not affect everyone in the same way, and the main differences are based on where the bone damage develops. Doctors usually describe two types of dysbaric osteonecrosis: lesions near major joints and lesions in the shaft of long bones. This matters in daily life because joint-adjacent disease is much more likely to cause pain, stiffness, and trouble moving, while the other type may cause no symptoms at all for a long time.
Type A
Type A dysbaric osteonecrosis affects bone near major joints such as the shoulder or hip, where movement puts more stress on the damaged area. This type is more likely to cause aching pain, reduced range of motion, or discomfort with walking, lifting, or reaching. In more advanced cases, the joint surface can collapse and symptoms often become more limiting.
Type B
Type B dysbaric osteonecrosis affects the shaft of long bones, away from the joint surface. It often causes few or no symptoms and may only be found on imaging done for screening or another reason. Among the types of dysbaric osteonecrosis, this form is usually less likely to interfere with day-to-day movement.
Can I slow down the onset of symptoms?
Not really. For dysbaric osteonecrosis, which is bone damage linked to repeated exposure to high pressure during diving or compressed-air work, there is no good evidence that diet, exercise, or supplements can meaningfully delay when symptoms start; the main proven step is to reduce risk in the first place by limiting repeated high-pressure exposure and following safe ascent and pressure-change rules, which can lower risk but cannot fully prevent the condition. If you have ongoing exposure, regular follow-up with a clinician experienced in diving or work-related pressure illness may help spot problems earlier, and careful prevention is still worthwhile even though it cannot promise a certain outcome.
What genetics can tell you about symptoms
For people living with dysbaric osteonecrosis, genetics does not currently tell doctors much about which symptoms will appear, how severe they will be, or when they will start. This condition is mainly linked to repeated exposure to pressure changes, such as deep diving or work in compressed-air settings, and many people have no symptoms at first while bone damage is found later on imaging. Researchers are studying whether inherited differences might affect risk in some people, but no specific genetic pattern is used in routine care to predict symptoms.
Causes and risk factors
Dysbaric osteonecrosis usually develops after repeated diving or compressed-air work, especially when decompression is too fast or happens many times over the years. These pressure changes can allow gas bubbles to form, and they may reduce blood flow to bone. Risk goes up with deep dives, long dives, frequent pressure exposure, and a past episode of decompression sickness. Smoking, heavy alcohol use, and health problems that affect blood supply can add to the risk factors for dysbaric osteonecrosis. It is rarely just one factor, and no single inherited gene is known to be a main cause.
What are the most common causes or risk factors?
The main cause of dysbaric osteonecrosis is repeated exposure to major pressure changes, most often in deep diving or compressed-air work such as tunneling, which can slowly damage the blood supply to part of a bone. The risk is higher in people who have done this kind of work for many years, have deeper or longer dives, come up too fast, or have had decompression sickness, also called the bends. No common inherited genetic cause is clearly known.
Environmental and biological risk factors
Dysbaric osteonecrosis is a form of bone damage linked to repeated work or activity in high-pressure environments, such as diving or compressed-air jobs. The risk usually depends more on how much pressure exposure builds up over time than on any one single event. Doctors often group risks into internal (biological) and external (environmental). Because early symptoms of dysbaric osteonecrosis can be absent for a long time, a careful exposure history matters most when thinking about risk.
Repeated dives or compressed-air shifts over months or years can raise the chance of bone damage. Each exposure gives more opportunity for gas bubbles and tiny blood vessel blockage to affect bone. This is one of the main patterns seen in dysbaric osteonecrosis.
Deeper pressure exposures and longer time under pressure increase the amount of gas dissolved in the body. That makes bubble formation during decompression more likely and can raise bone risk.
Ascending too quickly or following an incomplete decompression schedule can leave excess gas in tissues and blood. Those bubbles may reduce blood flow to bone and increase the risk of dysbaric osteonecrosis.
A past episode of decompression sickness suggests the body has already been stressed by pressure-related bubble formation. Recurrent episodes are associated with a higher chance of later dysbaric osteonecrosis.
Genetic risk factors
If you are worried because this condition seems to run in your family, the current evidence is somewhat reassuring. When people ask about genetic risk factors for dysbaric osteonecrosis, the main point is that no clear inherited cause has been proven. Dysbaric osteonecrosis is not usually considered a genetic disorder, and family history alone is not seen as a major risk factor. Science continues to uncover how these elements interact.
No known gene: No single gene has been shown to cause dysbaric osteonecrosis. At this time, there is no established genetic test that can reliably predict who will develop it.
Family history: Family history is not recognized as a major inherited risk factor for dysbaric osteonecrosis. Having a relative with the condition does not, by itself, suggest a clear genetic pattern.
Possible gene effects: Researchers have studied whether inherited differences in blood clotting, circulation, or bone repair might affect susceptibility. So far, these findings are not strong enough to count as proven genetic causes or routine clinical risk factors.
Lifestyle risk factors
Dysbaric osteonecrosis is linked to repeated or poorly managed pressure exposure, most often in diving or compressed-air work. The main lifestyle risk factors involve habits and behaviors that increase decompression stress or reduce bone blood flow and recovery. When people ask about lifestyle risk factors for dysbaric osteonecrosis, the most important issues are exposure patterns, fitness, and vascular health.
Skipping staged ascent stops or surfacing too quickly can increase bubble formation in the blood and tissues. Repeated decompression stress raises the chance of bone damage over time.
Very frequent diving or compressed-air work with short recovery intervals can add up to more cumulative decompression strain. Higher lifetime exposure is associated with a greater risk of dysbaric osteonecrosis.
Ignoring conservative dive tables, depth limits, or surface interval guidance can increase decompression load. Risk rises when exposure habits repeatedly push beyond safer margins.
Smoking can impair circulation and reduce oxygen delivery to bone. This may worsen the vascular injury that contributes to osteonecrosis after pressure exposure.
Risk prevention
Dysbaric osteonecrosis is not always fully preventable, but the risk can often be lowered by reducing repeated pressure-related stress on the body. This matters most for people who dive often or work in compressed-air settings, where bone damage may build up quietly over time before joint pain appears. Prevention is about lowering risk, not eliminating it completely.
Following dive tables, dive computers, and decompression rules helps lower the chance of bubble-related injury that can damage bone. This is one of the main ways to reduce the risk of dysbaric osteonecrosis in divers and compressed-air workers.
Frequent deep dives, long bottom times, and repeated high-pressure shifts can raise risk over time. Planning schedules with enough recovery between exposures may help protect bone and joint health.
Skipping rapid ascents and avoiding unnecessary repetitive dives can reduce decompression stress. If you have had decompression sickness before, careful medical review is important because it may raise the future risk of dysbaric osteonecrosis.
Proper training, well-maintained pressure equipment, and clear emergency procedures help lower preventable exposure problems. In compressed-air jobs, following occupational safety rules can reduce long-term risk.
Can you prevent Dysbaric osteonecrosis?
Not completely. For this kind of bone damage linked to repeated pressure changes, the risk can often be lowered by following safe diving or compressed-air work rules, including slow, proper return to normal pressure and avoiding unnecessary repeated high-pressure exposures. For many living or working in these settings, regular checkups and early attention to decompression sickness symptoms can also help reduce the chance of long-term bone injury.
Transmission
Dysbaric osteonecrosis is not infectious, so it cannot spread from person to person through touch, coughing, sex, blood, or shared food. It also is not usually something passed down in families; instead, it develops after exposure to major pressure changes, most often in people who do repeated deep diving or work in compressed-air settings.
For many living with dysbaric osteonecrosis, the key issue is not contagion but pressure exposure over time, which can damage blood supply to parts of the bone. If you are wondering whether dysbaric osteonecrosis is contagious, the answer is no.
When to test your genes
For dysbaric osteonecrosis, genetic testing is not part of routine early detection or treatment planning. Risk is driven mainly by pressure exposure, decompression history, and related conditions, so the key steps are careful dive or work-history review, symptom reporting, and imaging when needed.
Diagnosis
Dysbaric osteonecrosis is usually diagnosed in people with a history of repeated exposure to compressed air or diving, especially if they develop deep joint pain or have imaging changes found after work or dive-related evaluations. Getting a diagnosis is often a turning point toward answers and support. The diagnosis of dysbaric osteonecrosis is based on your exposure history, where the bone changes are located, and imaging tests that look for areas of bone damage.
Doctors ask about diving, caisson work, hyperbaric exposure, and any past decompression sickness episodes. The timing, frequency, and length of these exposures can help show whether bone damage may be linked to pressure changes rather than another cause.
Many living with dysbaric osteonecrosis notice persistent pain in the shoulder, hip, or other large joints, especially with movement or weight-bearing. Some people have no symptoms at first, so normal daily activities may feel fine even when early bone changes are already present.
A clinician checks for joint tenderness, reduced range of motion, limping, or pain with certain movements. This exam cannot confirm the condition on its own, but it helps identify which joints may need imaging.
Standard X-rays are often the first imaging test used to look for areas of bone collapse, patchy bone damage, or joint surface changes. Early disease may not show up clearly, so normal X-rays do not fully rule it out.
How is Dysbaric osteonecrosis diagnosed?
Doctors diagnose dysbaric osteonecrosis by putting together your history of repeated diving or other work under high pressure, any joint pain or stiffness, and imaging tests that look for areas of bone damage. Plain X-rays can show more established damage, but an MRI scan is often better at finding early changes, especially in the hips and shoulders. Some people have no clear symptoms at first, so it may be found during screening or imaging after long-term pressure exposure.
Stages of Dysbaric osteonecrosis
Dysbaric osteonecrosis does not have defined progression stages. This is because it is usually identified by bone damage seen on imaging rather than by a steady, predictable pattern of worsening over time, and some people have no symptoms at all for months or even years. Often the process begins when you notice changes in daily life, such as deep joint pain after walking, climbing stairs, or lifting, especially if the hip or shoulder is involved; these can overlap with the early symptoms of dysbaric osteonecrosis. Doctors usually diagnose and monitor dysbaric osteonecrosis with a history of pressure exposure, an exam, and imaging tests such as X-rays or MRI scans to look for bone injury and possible joint damage.
Outlook and prognosis
The outlook for dysbaric osteonecrosis depends largely on where the bone damage occurs and how advanced it is when found. Lesions near joints, especially in the hip or shoulder, are more likely to progress, cause chronic pain and loss of function, and sometimes lead to joint collapse requiring surgery such as joint replacement, whereas shaft lesions in long bones may remain stable and cause few or no symptoms. Early diagnosis, stopping further pressure exposure, and careful orthopedic follow-up can help limit progression, but established bone necrosis does not usually reverse. Many affected people can live a normal lifespan, although some develop lasting disability that affects work and mobility. Mortality is not typically increased directly by dysbaric osteonecrosis itself, but prognosis for quality of life is worse in those with extensive joint involvement or repeated exposure without prevention.
Long-term effects
Dysbaric osteonecrosis can have lasting effects on the joints, especially after repeated exposure to compressed air or diving pressure changes. Many people living with dysbaric osteonecrosis do not notice problems right away, but damage can build over time and show up years later. Long-term effects vary widely, from silent bone changes seen on scans to painful joint damage that affects walking, lifting, or reaching overhead.
Ongoing pain is one of the main long-term effects of dysbaric osteonecrosis, often affecting the hips or shoulders. For many, this can mean aching after activity, pain at rest, or discomfort that slowly becomes more frequent.
The joint may gradually become stiff and harder to move through its full range. Simple tasks like climbing stairs, getting out of a chair, or reaching up to a shelf can become more difficult over time.
In more advanced cases, the damaged area of bone can weaken and collapse. When this happens near a joint surface, it can lead to lasting damage and a clear drop in joint function.
Dysbaric osteonecrosis can increase the risk of wear-and-tear joint damage, also known as osteoarthritis. This may bring swelling, grinding, and deeper pain with movement, even if the early symptoms of dysbaric osteonecrosis were mild or absent.
How is it to live with Dysbaric osteonecrosis?
Living with dysbaric osteonecrosis can be frustrating because the damage often builds quietly after repeated exposure to pressure changes, then shows up as deep joint pain, stiffness, and trouble moving, especially in the shoulders and hips. For many people, this can make climbing stairs, lifting, diving, or even long periods of standing harder, and some may need to change jobs, cut back on physical activity, or plan daily routines around pain and limited motion. The effects can ripple outward too, with family members, coworkers, and dive partners often helping with practical tasks, transportation, or career adjustments, which is why early medical follow-up and reducing further pressure exposure matter so much.
Treatment and drugs
Dysbaric osteonecrosis is treated by reducing further pressure-related exposure, easing pain, and protecting the affected joint so damage does not get worse. Treatment often looks different for each person, because care depends on which bones are affected, how advanced the damage is, and whether there are symptoms such as pain or stiffness. Many people with dysbaric osteonecrosis do well with pain-relieving medicines, physical therapy, activity changes, and close follow-up, while more serious cases may need procedures such as surgery to preserve the joint or replace it if the joint surface has collapsed. Alongside medical treatment, lifestyle choices play a role, including avoiding additional unsafe diving or compressed-air work until a specialist says it is safe, since this can help prevent new injury.
Can you cure Dysbaric osteonecrosis?
No, dysbaric osteonecrosis cannot be cured once the bone has been damaged, because bone tissue that has died does not grow back to normal. Treatment can still help by easing pain, protecting the joint, and keeping you moving as well as possible, and some people with more serious damage may need surgery, including joint replacement. Avoiding more high-pressure exposure, such as diving or compressed-air work, is also important to help prevent further damage.
Non-drug treatment
Treatment for Dysbaric osteonecrosis often aims to reduce stress on the affected joint, ease pain, and help preserve movement. Managing this condition often starts with avoiding further exposure to high-pressure work or diving, especially while the joint is being assessed. Early non-surgical treatment for dysbaric osteonecrosis may help some people stay active longer, but care depends a lot on which bone is affected and whether the joint surface has started to collapse.
Avoiding further compressed-air work or diving can help limit added joint damage. This is often one of the first steps while specialists assess how advanced the bone injury is.
Reducing high-impact activity can take pressure off a damaged hip, shoulder, or knee. Many living with Dysbaric osteonecrosis may do better with pacing, shorter walks, and switching to lower-impact movement.
Physical therapy can help maintain range of motion, muscle strength, and safer movement patterns around the affected joint. Supportive therapies can make daily tasks like climbing stairs or getting dressed feel less painful and more manageable.
A cane, crutch, or walker can unload weight from a painful leg joint and improve balance. Some may also benefit from braces or shoe inserts, depending on which area is affected.
Your genes may have an impact on how drugs work for you
For people living with dysbaric osteonecrosis, treatment is usually focused on pain relief, protecting the joint, and sometimes surgery, and there is no well-established evidence that common gene differences strongly change how this condition itself responds to medication. That said, people can still react differently to pain medicines or drugs used during surgery, and part of that can be due to inherited differences in how the body breaks down medicines. In day-to-day life, this can mean one person gets good pain relief from a usual dose while another may need a different plan or may have more side effects.
Pharmacological treatments
Living with dysbaric osteonecrosis can mean deep joint pain, stiffness, and trouble with everyday movement, especially in the hips or shoulders. There is no proven medicine that reverses dysbaric osteonecrosis itself, so drug treatment is mainly used to ease symptoms while doctors monitor the joint and consider other options, including surgery when needed. Medication can feel like a big step, but for this condition it is usually about pain control and helping you stay as active and comfortable as possible.
Acetaminophen is often used for mild to moderate pain from dysbaric osteonecrosis. It can help with day-to-day discomfort, but it does not repair the damaged bone.
Anti-inflammatory pain medicines such as ibuprofen or naproxen may help if pain flares with walking, climbing stairs, or after a long day on your feet. These drugs can reduce pain and some inflammation around the joint, though they do not stop the underlying bone injury.
If pain becomes more severe, doctors may sometimes use prescription pain relievers such as tramadol or, in select cases, short-term opioids. These are usually reserved for limited periods because of side effects, drowsiness, constipation, and the risk of dependence.
Drugs such as alendronate are sometimes discussed in osteonecrosis because they may slow bone breakdown in some settings. For dysbaric osteonecrosis, though, evidence is limited, so they are not standard treatment and are used selectively if at all.
Genetic influences
For dysbaric osteonecrosis, the biggest driver is repeated exposure to major pressure changes, such as deep diving or working in compressed air, rather than a single known inherited cause. Researchers think inherited differences in how the body handles blood flow, clotting, and bone repair may help explain why some people develop bone damage after similar exposure while others do not. Genetics is only one piece of the puzzle, but it does not appear to be the main reason dysbaric osteonecrosis happens. At this point, there is no standard genetic test used to predict dysbaric osteonecrosis, and family history alone is not a reliable way to judge risk. For many living with this condition, the more useful focus is on known risk factors for dysbaric osteonecrosis, including pressure exposure patterns, decompression practices, and other health factors that affect circulation. If you are concerned because of your job or diving history, a doctor will usually look at your exposure history and symptoms first, with genetics playing only a supporting role.
Is Dysbaric osteonecrosis genetic?
Genetics do not appear to be a main cause of Dysbaric osteonecrosis. Some genetic variations may slightly affect risk, but pressure exposure and decompression history are thought to matter much more, and genetic testing is not routinely used.
Having a genetic risk is not necessarily a diagnosis
In the general population, genetic variants are common and are a normal part of human biology. Most do not directly affect health and are simply part of natural human diversity. For many genes, having a variant associated with a condition points to a possible link rather than a certain diagnosis, especially when more than one gene and environmental factors play a role. Still, in some cases, one well-characterized variant in a specific gene can be enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
For many living with dysbaric osteonecrosis, the biggest treatment questions are how to ease pain, protect the joint, and decide whether surgery may be needed. At this point, genetic testing is not a routine part of treatment for dysbaric osteonecrosis, because no specific gene result is widely used to choose the drugs used to treat dysbaric osteonecrosis or to predict which treatment will work best. Doctors usually base care on where the bone damage is, how advanced it looks on imaging, symptoms, and whether there is ongoing exposure to pressure changes, such as diving or compressed-air work.
Genetics is only one factor, and in dysbaric osteonecrosis it often matters less than the bone injury itself. Pain medicines and other supportive treatments are chosen mainly based on your overall health, kidney and liver function, bleeding risk, and any other medicines you take. If surgery becomes part of treatment for dysbaric osteonecrosis, inherited differences can still affect how some people respond to certain pain medicines or anesthesia, but that is a general medication issue rather than something unique to this condition.
Interactions with other conditions
People living with dysbaric osteonecrosis may find that joint pain and stiffness look a lot like arthritis or other common bone and joint problems, especially in the shoulder, hip, or knee. That can make the early symptoms of dysbaric osteonecrosis harder to sort out, particularly if someone already has osteoarthritis, an old injury, or another cause of reduced blood flow to bone. Doctors call it a comorbidity when two conditions occur together. In practice, bone diseases that also damage the joint surface can add to pain and loss of movement, and advanced dysbaric osteonecrosis itself can lead to secondary osteoarthritis over time. Other illnesses linked to poor circulation or abnormal clotting may also complicate the picture, because they can increase the risk of bone injury from more than one direction. If symptoms are changing or affecting daily tasks like climbing stairs, lifting, or getting up from a chair, it is worth asking whether dysbaric osteonecrosis is overlapping with another joint or vascular condition.
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 Dysbaric osteonecrosis?
Dysbaric osteonecrosis can look like more common joint problems, especially wear-and-tear arthritis, a strained or injured shoulder or hip, or long-lasting tendon problems. It can also be confused with other kinds of bone damage caused by poor blood flow, which may happen after long-term steroid treatment or heavy alcohol use. In divers and people who work in compressed air, decompression sickness, often called the bends, can also cause deep aching joint pain and may seem similar at first.
History
People living with dysbaric osteonecrosis may not notice anything at first, then months or even years later they can develop deep joint pain, stiffness, or trouble moving a shoulder or hip after a history of working or diving under pressure. This delayed pattern is one reason the condition took time to recognize. Early doctors and diving specialists had to connect bone damage seen later on with earlier exposure to compressed air or diving environments.
Across cultures and time periods, people who worked in tunnels, caissons, and undersea settings described pressure-related illness, but the bone problems were not understood right away. In the late 19th and early 20th centuries, attention first focused on the sudden effects of decompression sickness, such as joint pain and neurologic symptoms. As X-rays became more widely used, doctors began to see that some workers and divers had lasting damage in the long bones near the shoulder and hip joints, even after the original pressure exposure had passed.
Over time, dysbaric osteonecrosis became recognized as a distinct long-term complication of repeated or poorly managed pressure exposure. Researchers learned that it involves areas of bone losing their blood supply and gradually breaking down, which helps explain why the early symptoms of dysbaric osteonecrosis can be subtle while later joint damage can be more serious. In recent decades, awareness has grown as occupational medicine, diving medicine, and imaging tests have improved. Even so, the condition is less common now in places with stronger safety standards, careful decompression practices, and better monitoring of people whose work or sport involves pressure changes.