Ehlers-Danlos Syndromes (EDS)

The Ehlers-Danlos syndromes are a group of heritable connective-tissue disorders that mainly affect the skin, joints, and blood vessel walls. Connective tissue is built largely from collagen, the protein that gives tissues their strength and stretch, and in EDS the collagen is faulty or in short supply. This can make joints unusually flexible and skin unusually stretchy or fragile. Severity ranges widely, from mild flexibility to rare, life-threatening complications. EDS is lifelong and present from birth, even if it is recognized much later.

In 2017, the International Consortium on EDS and Related Disorders published a classification recognizing 13 subtypes. These are: classical, classical-like, cardiac-valvular, vascular, hypermobile, arthrochalasia, dermatosparaxis, kyphoscoliotic, brittle cornea syndrome, spondylodysplastic, musculocontractural, myopathic, and periodontal. Each subtype has its own pattern of features, and most have a known genetic cause. This update replaced an older system and aimed to sharpen diagnosis and support research. Most subtypes are rare, while a few account for the great majority of people diagnosed.

Hypermobile EDS (hEDS) is the most common subtype, and it sits alongside the hypermobility spectrum disorders (HSD), a related group introduced in 2017 for people with symptomatic joint hypermobility who do not meet the full hEDS criteria. hEDS centers on generalized joint hypermobility, joint instability, chronic pain, and fatigue, often with less dramatic skin findings than other types. Unlike most subtypes, hEDS has no confirmed gene, so it remains a clinical diagnosis. hEDS and HSD are managed very similarly, and many clinicians consider them part of one continuum.

Classical EDS (cEDS) is one of the more recognizable subtypes, defined by markedly hyperextensible (stretchy) skin, atrophic scarring, and generalized joint hypermobility. Skin is fragile and tends to split with minor trauma, especially over the forehead, knees, shins, and elbows, and wounds heal slowly into wide, thin scars sometimes described as "cigarette paper." Easy bruising is common. cEDS is usually caused by changes in the collagen genes COL5A1 or COL5A2 and is inherited in an autosomal dominant way. It is less common than hypermobile EDS.

Vascular EDS (vEDS) is the most serious subtype because it weakens the walls of arteries and hollow organs, which can rupture unpredictably. People with vEDS often have thin, translucent skin, easy bruising, and a characteristic facial appearance, and they face risks of arterial rupture or dissection, bowel rupture, and uterine rupture in pregnancy. It is caused by changes in the COL3A1 gene affecting type III collagen and is inherited in an autosomal dominant pattern, though about half of cases arise from a new (de novo) gene change. GeneReviews reports a median survival of around 50 years, with serious complications often emerging in early adulthood. Because of these risks, vEDS requires specialist care and surveillance.

Beyond hypermobile, classical, and vascular EDS, the 2017 classification includes several rare subtypes. Kyphoscoliotic EDS features progressive spinal curvature present from birth, low muscle tone, and fragile eyes. Arthrochalasia EDS involves severe joint hypermobility with hip dislocation at birth, and dermatosparaxis EDS causes extremely loose, sagging, fragile skin. Others include classical-like, cardiac-valvular, brittle cornea syndrome, spondylodysplastic, musculocontractural, myopathic, and periodontal EDS. Each is defined by specific features and, in most cases, a specific gene, and several follow autosomal recessive inheritance.

MedlinePlus Genetics estimates the combined prevalence of all EDS types at least 1 in 5,000 people worldwide, with the hypermobile and classical types being the most common. Many of the other subtypes are individually rare, sometimes reported in only a small number of families. Because hypermobile EDS has no genetic test and overlaps with hypermobility spectrum disorders, its true frequency is uncertain and may be underestimated. Awareness has grown in recent years, which is gradually shortening the long delays many people once faced before diagnosis.

Collagen is the main structural protein in connective tissue, giving skin, joints, blood vessels, and organs both strength and flexibility. In EDS, gene changes disrupt how collagen (or the proteins that process and organize it) is made, assembled, or folded. The result is connective tissue that is weaker, more stretchy, or more fragile than usual. Because collagen is found throughout the body, EDS can affect many systems at once. Different subtypes involve different collagen-related genes, which is why their features differ.

Most EDS subtypes are inherited in an autosomal dominant pattern, meaning a single altered copy of the gene is enough to cause the condition, and each child of an affected parent has a 1-in-2 chance of inheriting it. Some subtypes, such as kyphoscoliotic and dermatosparaxis EDS, are autosomal recessive, requiring two altered copies, with a 1-in-4 chance when both parents are carriers. In vascular EDS, about half of cases arise from a new gene change with no family history. A genetic counselor can explain inheritance and recurrence risk for a specific family.

MedlinePlus Genetics notes that at least 20 genes can cause EDS. Classical EDS is usually linked to COL5A1 or COL5A2; vascular EDS to COL3A1 (type III collagen); arthrochalasia EDS to COL1A1 or COL1A2; and dermatosparaxis EDS to ADAMTS2, a gene needed to process collagen. Kyphoscoliotic EDS is linked to PLOD1 or FKBP14, and classical-like EDS to TNXB. Identifying the gene helps confirm the subtype and guides care, though the exact features can vary even within one gene.

Hypermobile EDS is the most common subtype, yet its genetic cause remains unknown, which makes it the one type without a confirmatory genetic test. Researchers are actively studying why, and most experts believe more than one gene or mechanism may be involved. Because of this, hEDS is diagnosed clinically using defined criteria rather than a blood test. This gap also means hEDS often overlaps with hypermobility spectrum disorders, which share the same lack of a known gene. Finding the cause is a major research priority.

Joint hypermobility means the joints can move beyond the typical range of motion, and it is the central feature of hypermobile EDS and present in many other subtypes. People may describe themselves as "double-jointed," and clinicians often measure it using the Beighton score. While some hypermobility is harmless, in EDS it commonly comes with pain, instability, and a feeling that joints are loose or unreliable. The degree of hypermobility can change with age, often lessening over time even as related symptoms persist.

Because the connective tissue supporting the joints is lax, joints in EDS can be unstable and prone to dislocations (full slips out of place) and subluxations (partial slips). These can happen with minor movements and may recur frequently in the same joints, such as the shoulders, kneecaps, or fingers. Repeated instability contributes to pain, soft-tissue injury, and over time, wear on the joints. Many people learn which movements trigger episodes and how to manage them, often with help from physiotherapy.

Chronic pain is extremely common in EDS, and one literature review reported that roughly 90% or more of people with EDS experience it. The pain can come from unstable joints, muscle strain from compensating for lax tissue, prior injuries, and altered pain processing. It is often widespread rather than confined to one joint and may not respond well to standard painkillers, which is why management usually combines several approaches. Pain can fluctuate and significantly affect daily activities, sleep, and mood.

Skin involvement varies by subtype but often includes skin that is softer and thinner than usual, stretchy (hyperextensible), and fragile. In classical EDS the skin can split easily over bony areas and heal into wide, thin atrophic scars, while in vascular EDS the skin is thin and translucent with visible veins. Easy bruising is common across many subtypes. Because wounds may heal slowly and poorly, skin protection and careful wound care matter, particularly before any surgery.

Many people with EDS, especially the hypermobile type, experience significant fatigue that is out of proportion to activity and can be one of the most limiting symptoms. Muscles often work harder to stabilize lax joints, contributing to muscle pain, stiffness, and a feeling of weakness. Soft-tissue problems such as tendon and ligament strains, hernias, and easy injury can also occur. Fatigue frequently overlaps with poor sleep, pain, and other associated conditions, so it is usually addressed as part of overall management rather than in isolation.

In 2017, the International Consortium on EDS and Related Disorders published diagnostic criteria for each of the 13 subtypes to reduce variability and support research. For most subtypes, diagnosis combines a clinical evaluation with genetic confirmation of the relevant gene. The criteria describe the specific combination of features, family history, and test results needed for each type. They also formally introduced hypermobility spectrum disorders as a related category. These criteria are now the standard reference clinicians use.

The Beighton score is a screening tool that rates generalized joint hypermobility on a 9-point scale by checking specific movements, such as bending the little fingers and thumbs, elbows, knees, and placing the palms flat on the floor. It is one part of assessing hypermobile EDS and is interpreted with adjustments for age and sex, since flexibility naturally changes over life. A high score supports the presence of generalized hypermobility but is not by itself a diagnosis of EDS. Clinicians combine it with other criteria and the person's full history.

For most EDS subtypes, genetic testing can confirm the diagnosis by identifying a change in the relevant gene, such as COL3A1 for vascular EDS or COL5A1/COL5A2 for classical EDS. Testing is often arranged through genetics services and may be especially important when a serious subtype like vascular EDS is suspected. A confirmed result can guide care, surveillance, and family planning, and a genetic counselor can help interpret the findings. Testing does not, however, work for hypermobile EDS, which has no identified gene.

Hypermobile EDS is diagnosed clinically using the 2017 criteria, because there is currently no genetic test for it. Diagnosis requires meeting three components: generalized joint hypermobility (often measured by the Beighton score), a specific set of systemic features and/or family history, and exclusion of other conditions that could explain the symptoms. This careful process helps distinguish hEDS from other causes of hypermobility. The reliance on clinical judgment is one reason diagnosis can take time and benefits from a clinician experienced with EDS.

The 2017 framework introduced hypermobility spectrum disorders (HSD) to describe people who have symptomatic joint hypermobility but do not meet all the criteria for hypermobile EDS. The distinction is based on the specific criteria met, not on how severe a person's symptoms are, and someone with HSD can be affected just as much as someone with hEDS. Importantly, HSD and hEDS are managed in essentially the same way, focusing on the symptoms present. The label mainly helps with consistency in research and care rather than implying a milder condition.

Dysautonomia, dysfunction of the autonomic nervous system that controls things like heart rate and blood pressure, is frequently associated with EDS, especially the hypermobile type. A common form is postural orthostatic tachycardia syndrome (POTS), in which the heart rate rises sharply on standing, causing dizziness, palpitations, and fatigue. One pediatric hEDS series reported POTS symptoms in about 57% of patients, and POTS, hypermobility, and gut symptoms often cluster together. The exact mechanism linking them is not fully understood. Recognizing dysautonomia can help guide symptom management.

Mast cell activation syndrome (MCAS) is reported more often in people with hypermobile EDS than in the general population. MCAS involves overactive mast cells releasing chemical mediators, causing episodic symptoms such as flushing, hives, itching, abdominal pain, and reactions to foods or triggers. It often appears alongside POTS and gastrointestinal symptoms, and researchers suspect shared mechanisms like immune dysregulation and inflammation. The exact role of mast cells in EDS-related symptoms is still being studied. Diagnosis and treatment are best handled by clinicians familiar with these overlaps.

Gastrointestinal symptoms are common in hypermobile EDS, and motility testing studies have found a high rate of dysmotility, where the digestive tract does not move contents along normally. One tertiary-center study reported gastroparesis (delayed stomach emptying) in about 43% of tested hEDS patients, along with esophageal and more global dysmotility in smaller proportions. Symptoms can include bloating, reflux, nausea, constipation, and abdominal pain. These problems often overlap with dysautonomia and may affect nutrition. A gastroenterologist familiar with EDS can help with assessment and management.

Mental-health conditions, particularly anxiety and depression, occur more often in people with EDS than in the general population. The reasons are multifactorial and can include chronic pain, fatigue, uncertainty, and the stress of seeking a diagnosis, as well as possible biological links. Mental-health support is considered an important part of comprehensive EDS care, not a sign that symptoms are "all in the mind." Addressing mood and anxiety can meaningfully improve quality of life.

Headaches and migraines are very common in hypermobile EDS, and chronic fatigue is also frequent. A smaller subset of people raise concerns about the craniocervical junction, where the skull meets the spine, including instability that can cause neurological symptoms. This is an area of ongoing research and debate, and any suspected craniocervical problem needs careful evaluation by specialists rather than self-diagnosis. Most headaches and fatigue in EDS are managed without surgery. Awareness helps, but interventions should be guided by experienced clinicians.

The most dangerous emergency in vascular EDS is rupture or dissection of an artery, which can occur suddenly and without warning, sometimes in young adults. Warning signs can include sudden, severe, unexplained chest, abdominal, back, or limb pain, and signs of internal bleeding such as faintness or collapse. GeneReviews reports that arterial and organ complications drive a reduced median survival of around 50 years in vEDS. People with known or suspected vEDS should seek emergency care immediately for such symptoms and make sure clinicians know their diagnosis. Carrying medical-alert information is often recommended.

In vascular EDS, the walls of hollow organs can be fragile, and spontaneous rupture, most often of the sigmoid colon, is a recognized life-threatening event. Sudden severe abdominal pain, with or without signs of shock, can indicate a perforation that requires urgent surgical assessment. GeneReviews notes that gastrointestinal rupture is one of the major complications of vEDS and can occur even in childhood. Surgery in vEDS is itself higher-risk because of tissue fragility, so it must be done by teams aware of the diagnosis. Anyone with vEDS and sudden severe abdominal pain should seek emergency care.

For people with vascular EDS, pregnancy carries serious risks, including uterine rupture, arterial rupture, and severe bleeding around delivery. GeneReviews cites studies reporting a mortality rate of roughly 5% per pregnancy in women with vEDS, though many pregnancies proceed safely when the diagnosis is known and care is specialized. Because of these risks, pregnancy in vEDS is managed as high-risk by experienced maternal-fetal medicine teams. Sudden severe abdominal pain, bleeding, or collapse during or after pregnancy is an emergency. Pre-pregnancy counseling is strongly advised for anyone with vEDS.

Spontaneous pneumothorax, a sudden collapse of part of the lung, is a recognized complication of vascular EDS and can occur without injury. Typical symptoms are sudden sharp chest pain and shortness of breath, which may come on at rest. GeneReviews lists spontaneous pneumothorax or hemopneumothorax among the major events in vEDS. This needs prompt medical evaluation, as it can worsen quickly. People with vEDS experiencing sudden chest pain or breathing difficulty should seek urgent care and inform clinicians of their diagnosis.

While many people with EDS manage occasional subluxations and dislocations at home, some dislocations are emergencies. Seek urgent care if a joint is severely deformed, cannot be relocated, or is accompanied by numbness, loss of pulse or color, severe swelling, or inability to move the limb, as these can signal nerve or blood-vessel involvement. Forcing a difficult dislocation back into place can cause harm, so professional reduction may be needed. People with EDS may also need gentler handling because of fragile tissues. When in doubt about a severe joint injury, medical assessment is the safe choice.

There is currently no cure for any type of EDS, so treatment focuses on managing symptoms, protecting tissues, and preventing complications. Because EDS affects many body systems, care often involves a team that may include physiotherapists, pain specialists, geneticists, and others depending on the subtype and symptoms. Plans are individualized, since needs differ widely from person to person. The goals are usually to reduce pain, improve stability and function, and support quality of life. Early diagnosis and education are associated with better outcomes.

Physiotherapy is a central part of managing EDS, aiming to strengthen the muscles that support and stabilize loose joints. Programs usually emphasize low-impact, gradual strengthening and improving body awareness (proprioception), since people with EDS may have a poor sense of joint position. Exercise is typically introduced carefully to avoid triggering injury or flares, and pacing is important. Many people work with therapists experienced in hypermobility to tailor a sustainable routine. Done appropriately, strengthening can reduce instability and pain over time.

Joint protection strategies aim to reduce strain on lax joints and prevent dislocations and injury. These can include braces, splints, or supports for unstable joints, as well as occupational-therapy advice on movement, posture, and assistive devices. People are often guided to modify activities, avoiding movements that overextend joints, while staying as active as is safe. Bracing is usually one part of a broader plan that includes strengthening, since over-reliance on supports can sometimes weaken muscles. An occupational or physical therapist can help find the right balance.

Pain in EDS often responds poorly to standard painkillers alone, likely because its causes differ from ordinary injury pain. A review of the literature suggests management should address not only pain but also fatigue, impaired proprioception, and energy use, using a multidisciplinary approach. This can combine physiotherapy, psychological strategies, pacing, and carefully chosen medications, individualized to the person. There are not yet universally agreed treatment standards, and access to clinicians trained in EDS care can be limited. Working with a pain specialist familiar with EDS is often helpful.

Surgery in EDS requires special care because fragile tissues, easy bleeding, and slow wound healing raise the risk of complications. Reports on procedures such as scoliosis correction describe increased risks of vascular and wound problems and recommend precautions, which can include measures to control bleeding and gentle surgical technique. Wounds may need careful closure and extended healing time, and decisions about operating are weighed carefully against the benefits. Surgical teams aware of the EDS diagnosis, and the specific subtype, can plan accordingly. This is especially critical in vascular EDS.

Because of the risk of arterial events, vascular EDS is managed with regular surveillance and prevention rather than waiting for problems. GeneReviews describes noninvasive arterial imaging (such as ultrasound, MRI, or CT angiography) at intervals, avoiding trauma and certain invasive procedures, and care by a multidisciplinary team. The medication celiprolol, a beta-blocker, has been shown in studies to reduce the rate of vascular events, though research notes that patients still remain at significant risk despite treatment. Prevention programs also emphasize adapting and limiting strenuous physical activity. Management of vEDS should be led by specialists experienced in the condition.

Pregnancy experiences in EDS differ widely depending on the subtype and the individual. Across types, people may face higher chances of complications such as premature labor, bleeding around delivery (postpartum hemorrhage), tissue and wound problems, and pelvic or joint pain. Anesthetic planning can also need extra attention. Research suggests EDS should be flagged early in prenatal care so the team can plan appropriately. Pre-pregnancy counseling and care from clinicians aware of the diagnosis help reduce risks.

In hypermobile EDS and HSD, large surveys report higher-than-average rates of complications such as preterm birth, premature rupture of membranes, and bleeding before and after birth, along with issues like increased joint pain and instability. Classical EDS adds concerns around skin and soft-tissue fragility, poor wound healing, and bleeding. Many people with these subtypes have healthy pregnancies, but individualized obstetric care helps anticipate and manage problems. Discussing plans with the care team in advance, including pain relief and delivery options, is commonly advised. Each pregnancy can be different.

Vascular EDS poses the greatest reproductive risk of all the subtypes, because pregnancy and delivery can trigger life-threatening events including uterine rupture, arterial rupture, and severe hemorrhage. GeneReviews cites a reported mortality of roughly 5% per pregnancy in women with vEDS. Pregnancy is classified as very high-risk and should be managed by experienced maternal-fetal medicine and specialist teams, with careful planning for delivery and emergencies. Many pregnancies can proceed when the diagnosis is known and care is specialized, but the risks are serious. Pre-pregnancy counseling is strongly recommended for anyone with vEDS.

Pacing means spreading activity through the day and balancing it with rest to avoid the boom-and-bust cycle of overdoing it and then crashing. Because fatigue, pain, and joint instability are common in EDS, managing energy is often as important as managing pain. Strategies can include planning demanding tasks, breaking them into smaller steps, and building in recovery time. Occupational therapists frequently help people develop sustainable routines and use assistive tools. Over time, consistent pacing can support more stable functioning and fewer flares.

Living with a chronic, multi-system condition can take an emotional toll, and anxiety and depression are more common in people with EDS. Psychological support, such as counseling or strategies to cope with pain and uncertainty, is considered part of comprehensive care rather than an afterthought. Approaches that address stress, sleep, and mood can also influence how pain and fatigue are experienced. Seeking mental-health support is not a sign that symptoms are imagined; it reflects the genuine burden of the condition. Many people find that addressing wellbeing improves their overall quality of life.

Because EDS is relatively uncommon and often misunderstood, many people feel isolated, and peer support can be a lifeline. Patient organizations like The Ehlers-Danlos Society offer information, community, and resources, and local or online support groups let people share practical tips and emotional support. Hearing how others manage pacing, flares, appointments, and daily challenges can be both validating and useful. Community can also help people advocate for themselves within the healthcare system. Connecting with trustworthy organizations helps ensure the information shared is reliable.

A common and painful part of the EDS experience is the long road to diagnosis, with many people reporting years of symptoms, misdiagnosis, or being told their symptoms were psychological. Research describes how perceived dismissal of symptoms and diagnostic uncertainty can add real distress on top of the condition itself. Being believed and getting an accurate diagnosis is often described as validating and a turning point toward better care. Growing awareness among clinicians is gradually improving recognition. Keeping records, seeking knowledgeable providers, and connecting with patient communities can all help during this process.