Introduction: Who Should Undergo Diagnostics

If you have noticed that your joints move far beyond what seems normal for most people, or if your skin stretches unusually or bruises very easily, it might be time to talk to a doctor about getting checked for Ehlers-Danlos syndrome. These symptoms, especially when they appear together or run in your family, can be early signs that something is affecting the connective tissue in your body—the material that holds your skin, joints, blood vessels, and organs together.^[1]

You should consider seeking diagnostic evaluation if you experience several troublesome symptoms at the same time. Many people with Ehlers-Danlos syndrome have a combination of overly flexible joints that dislocate easily, skin that tears or bruises without much cause, chronic pain, or unusual tiredness that doesn’t go away with rest. Sometimes these symptoms start in childhood, but they can also become noticeable later in life.^[3]

It’s important to know that having just one or two symptoms doesn’t automatically mean you have Ehlers-Danlos syndrome. For example, joint flexibility by itself is fairly common—about 1 in 30 people have more flexible joints than usual. However, if this flexibility comes along with joint pain, frequent dislocations, skin problems, or a family member who has been diagnosed with the condition, then it’s worth getting a proper medical assessment.^[3]

Sometimes the path to diagnosis can be long and frustrating. Because Ehlers-Danlos syndrome affects so many different parts of the body, patients often see many doctors before someone connects all the symptoms together. Some people report visiting ten or more healthcare providers and being told their symptoms might be psychological before finally receiving a correct diagnosis.^[13]

Your first step is usually to see your general practitioner, who can review your medical history and symptoms. If they suspect Ehlers-Danlos syndrome, they may refer you to a specialist such as a rheumatologist (a doctor who specializes in joint problems) or to a genetics service for further evaluation. The earlier you seek help and receive an accurate diagnosis, the sooner you can begin appropriate treatment to manage symptoms and prevent complications.^[3]

Classic Diagnostic Methods

Diagnosing Ehlers-Danlos syndrome involves several steps and approaches, depending on which type of the condition is suspected. Unlike many diseases that can be confirmed with a single blood test, EDS diagnosis often starts with a thorough clinical examination and evaluation of your personal and family medical history.^[9]

Physical Examination and Joint Assessment

One of the most important tools doctors use is called the Beighton score, which measures how flexible your joints are. During this test, the doctor will check specific joints to see if they bend further than normal. They will look at whether you can bend your pinky finger back beyond 90 degrees, touch your thumb to your forearm, hyperextend your elbows and knees beyond straight, and place your palms flat on the floor while keeping your knees straight.^[8]

However, the Beighton score doesn’t tell the whole story. This scoring system only checks a few joints and doesn’t account for hypermobility in other areas like the shoulders, neck, jaw, or individual fingers that can also be affected. Doctors also look for historical signs of hypermobility—whether you had unusual flexibility as a child or have experienced repeated joint dislocations or subluxations (partial dislocations) in the past.^[24]

Skin Examination

Your doctor will carefully examine your skin to check for hyperextensibility, which means the skin can be stretched beyond the normal range. They do this by pinching and lifting the skin on your forearm. If the skin stretches more than 1.5 centimeters, it’s considered hyperextensible. Some types of Ehlers-Danlos syndrome show more severe skin stretching, greater than 2 centimeters.^[2]

The doctor will also look for other skin characteristics that are common in EDS. These include skin that feels unusually soft and velvety, areas that bruise very easily even with minor bumps, unusual or widened scars (sometimes called “cigarette paper” scars because they’re thin and wrinkled), and wounds that heal slowly or split open easily.^[1][3]

Family History and Medical Background

A detailed family history is crucial in diagnosing Ehlers-Danlos syndrome because many types are inherited. Your doctor will ask whether anyone in your biological family has had similar symptoms, been diagnosed with EDS, or experienced problems like early-onset arthritis, frequent joint dislocations, or unusual bleeding and bruising. They’ll also want to know about any relatives who have had complications like blood vessel ruptures, organ problems, or difficulties during pregnancy.^[9]

Your personal medical history matters too. The doctor will ask about chronic pain lasting more than three months, how often you’ve dislocated joints, whether you’ve had digestive problems like heartburn or constipation, if you experience dizziness when standing up, and whether you have unusual fatigue or difficulty concentrating.^[3]

Genetic Testing

For some types of Ehlers-Danlos syndrome, genetic testing can confirm the diagnosis. A simple blood test can identify the specific genetic mutations that cause certain forms of EDS. This is particularly helpful for rarer types like vascular EDS, classical EDS, kyphoscoliotic EDS, and others where the responsible genes have been identified.^[9]

However, there’s an important limitation: For hypermobile Ehlers-Danlos syndrome (hEDS), which is the most common type, there is currently no genetic test available. Scientists haven’t yet identified the gene or genes responsible for this form. Therefore, hEDS is diagnosed based entirely on clinical criteria—the physical examination, joint assessment, symptoms, and family history.^[9][19]

Specialized Tests for Specific Types

Depending on which type of Ehlers-Danlos syndrome your doctor suspects, they may recommend additional tests. For vascular EDS, which affects blood vessels and can be life-threatening, your doctor might order imaging tests like an echocardiogram (an ultrasound of the heart), CT scans, or MRI scans to check for problems with the heart valves, blood vessels, or internal organs.^[9]

An echocardiogram is particularly important because it allows a specialist to see if your heart is beating and pumping blood correctly. Some types of EDS can affect the heart valves, especially causing mitral valve prolapse, where one of the heart’s valves doesn’t close properly. This test should be done as a baseline and may need to be repeated regularly to monitor for changes.^[17]

For certain rare types of EDS, specialized biochemical tests on cultured skin cells from a small skin sample (biopsy) can help confirm the diagnosis. These tests look at how collagen is formed and structured in your body. A diagnostic test of urinary markers can identify kyphoscoliotic-type EDS.^[15]

Diagnostic Criteria

In 2017, international experts on Ehlers-Danlos syndrome came together to create updated diagnostic criteria for the different types. For hypermobile EDS, you must meet all three main criteria to receive a diagnosis. The first is generalized joint hypermobility based on the Beighton score and history. The second involves having two or more specific features from defined categories, including a positive family history or chronic pain and recurrent dislocations. The third criterion requires ruling out other conditions that could explain your symptoms.^[24]

If you have many symptoms of hypermobility and joint problems but don’t quite meet all the strict criteria for hypermobile EDS, you might be diagnosed with hypermobility spectrum disorder (HSD). This is treated in much the same way as hEDS, and there’s ongoing debate among experts about whether these are truly separate conditions or different points on the same spectrum.^[3]

Finding the Right Specialists

Because Ehlers-Danlos syndrome is relatively rare and complex, not every doctor has experience diagnosing and treating it. If your general practitioner suspects EDS, they should refer you to a genetics service or specialized clinic. In some regions, there are dedicated EDS diagnostic services with experts who understand the condition thoroughly.^[3]

It can be helpful to wear a medical alert bracelet identifying that you have EDS, especially if you’re diagnosed with a type that has serious complications. In an emergency situation, this can inform medical personnel about your condition and help them provide appropriate care, such as being careful with sutures if you have fragile skin or being aware of risks like arterial rupture in vascular EDS.^[15]

Diagnostics for Clinical Trial Qualification

Clinical trials are research studies that test new approaches to diagnosis, treatment, or management of diseases. If you’re considering participating in a clinical trial for Ehlers-Danlos syndrome, you’ll need to undergo specific diagnostic tests to determine whether you’re eligible to enroll. These qualification criteria are designed to ensure the study includes the right participants and that results are meaningful and safe.^[4]

The first and most fundamental requirement for entering an EDS clinical trial is usually a confirmed diagnosis of Ehlers-Danlos syndrome. For types where genetic testing is available, you may need to provide documentation of a positive genetic test showing the specific mutation associated with your type of EDS. This genetic confirmation helps researchers create a study group with similar underlying causes, making it easier to understand whether a potential treatment works.^[4]

For hypermobile EDS, where genetic testing isn’t yet available, clinical trial entry typically requires that you meet the 2017 international diagnostic criteria. This means you’ll need comprehensive documentation from your medical records showing your Beighton score or historical joint hypermobility, the presence of specific clinical features like chronic pain or family history, and the exclusion of other conditions that could explain your symptoms.^[24]

Many clinical trials require baseline assessments before you can participate. These assessments help researchers understand your condition at the start of the study and measure whether any changes occur during the trial. For EDS trials, baseline testing often includes a detailed physical examination focusing on joint range of motion and stability, assessment of pain levels using standardized scales, evaluation of skin characteristics and any wounds or scars, and functional assessments measuring your ability to perform daily activities.^[4]

Depending on the trial’s focus, you might need specific cardiovascular testing. This is especially true if the trial involves a type of EDS that affects the heart or blood vessels. Standard tests might include an echocardiogram to check heart structure and function, blood pressure monitoring (sometimes including special tests for blood pressure changes when you stand up), and possibly imaging studies like CT or MRI scans to evaluate blood vessels.^[9]

Some trials studying pain management or quality of life in EDS patients require participants to complete questionnaires and assessments about their symptoms. These might measure your pain intensity and how it affects your life, your level of fatigue, your ability to perform work or household tasks, your mental health and wellbeing, and your overall quality of life. These assessments help researchers understand not just whether a treatment changes measurable physical signs, but whether it actually makes patients feel and function better.^[4]

Blood tests are commonly required for clinical trial enrollment. Basic laboratory work often includes complete blood counts, tests of liver and kidney function, and sometimes tests to measure inflammation markers or other substances in your blood. If the trial is testing a medication, additional tests might be needed to ensure you can safely take the drug and to monitor for any side effects during the study.^[4]

Clinical trials may exclude certain people from participating based on their test results or other health conditions. For example, if you have severe complications from EDS that could make participation risky, if you’re taking medications that might interfere with the study treatment, if you have other medical conditions that would make it hard to tell whether changes are due to the study treatment or something else, or if you’re pregnant or planning to become pregnant during the study period. These exclusions are designed to protect participants and ensure the study results are clear and interpretable.^[4]