Hypermobility syndrome is a condition in which joints move beyond the normal range of motion, often causing pain, stiffness, and fatigue even though the joints themselves are not damaged by arthritis. It happens when the connective tissue that holds joints together — mainly collagen — is more stretchy or fragile than usual. Doctors usually diagnose it by checking your joint mobility against a scoring system and by ruling out other conditions that cause similar symptoms.
What Is Hypermobility Syndrome?
Joint hypermobility means some or all of your joints bend farther than is typical. It is common and often harmless. Many people with flexible joints never have pain or other problems.
Hypermobility syndrome is different. It describes joint hypermobility that comes with symptoms — pain, frequent injuries, or other complaints — in a person who does not have a known inherited connective tissue disorder such as Ehlers-Danlos syndrome or Marfan syndrome.
One clarification that causes a lot of confusion: the naming of these conditions has changed over the years, and doctors do not always agree on the labels. Older terms like “benign joint hypermobility syndrome” are now less common. Many clinicians now use the term hypermobility spectrum disorders (HSD) to describe the range of hypermobility-related problems that fall short of a specific genetic diagnosis. If you have been given different names by different doctors, that may be why.
It is also worth knowing that hypermobility is not only about joints. Connective tissue is found throughout the body, so some people also have symptoms involving the skin, gut, or blood vessels. How much this matters varies widely from person to person.
What Is Hypermobility Syndrome Symptoms Causes Diagnosis?
The three parts of this question fit together, so it helps to take them in order. Symptoms are what you notice. Causes explain why the joints behave this way. Diagnosis is how a doctor sorts out whether your symptoms fit this pattern.
Symptoms usually center on the joints but can reach beyond them. Causes come down to the structure of connective tissue, which is largely inherited. Diagnosis relies on a physical exam, a mobility score, and ruling out other conditions — there is no single blood test that confirms it.
Keeping these three ideas separate matters, because treatment and expectations depend on which one you are dealing with at any given time.
What Are the Symptoms of Hypermobility Syndrome?
The most common symptom is joint pain, especially in the knees, hips, shoulders, and fingers. The pain often shows up after activity rather than during it, and it can feel achy or sharp.
Other symptoms people report include:
- Joints that click, pop, or feel like they “give way”
- Muscle pain and stiffness, particularly in the morning
- Frequent sprains, strains, or joint dislocations
- Long-lasting fatigue
- Easy bruising or skin that stretches more than usual
- Poor balance or a sense of being clumsy
Some people also describe digestive problems, dizziness when standing up, or problems with sleep. These are reported often enough that researchers take them seriously, but the evidence linking them directly to hypermobility is mixed. Not everyone with hypermobile joints has these issues, and not everyone with these issues has hypermobile joints.
An important point: the amount of flexibility does not predict how much pain someone has. Some people with very stretchy joints have no pain at all, while others with milder hypermobility have significant daily pain. Doctors cannot judge severity by how far a joint bends.
What Causes Hypermobility Syndrome?
The underlying cause is the makeup of your connective tissue. Collagen and related proteins give joints, skin, and blood vessels their strength and shape. When these proteins are built or organized differently, tissues stretch more easily.
In most cases, this runs in families. If a parent has flexible joints, their children are more likely to have them too. The exact genes involved are not fully mapped, which is one reason there is no genetic test for the common forms.
A smaller number of people have hypermobility as part of a specific inherited condition, such as a type of Ehlers-Danlos syndrome or Marfan syndrome. These conditions can involve the heart and blood vessels, so they need different medical attention. This is a key reason a proper evaluation matters — it is not just about flexibility.
Hypermobility can also be influenced by other factors:
- Sex — it is more common in women and girls
- Age — joints tend to stiffen with age, so symptoms may change over time
- Training — dancers, gymnasts, and some athletes develop greater flexibility through practice, which is different from an inherited trait
Hormonal changes, including pregnancy, can also affect joint looseness, though the reasons are not fully understood.
How Is Hypermobility Syndrome Diagnosed?
There is no single test that confirms hypermobility syndrome. Diagnosis is a process of putting several pieces together.
Doctors often start with a physical exam using a scoring system called the Beighton score. It checks flexibility at a few specific joints — for example, whether you can bend your little finger back, touch your thumb to your forearm, or bend forward and place your palms flat on the floor with straight knees. Each flexible joint adds a point. The Beighton score is a screening tool, not a diagnosis on its own. A high score tells your doctor your joints are unusually mobile; it does not explain whether that mobility is causing your symptoms.
From there, the evaluation usually includes:
- Your history — when symptoms started, what makes them better or worse, and whether relatives have similar issues
- A check for other conditions that cause joint pain, such as inflammatory arthritis or thyroid problems
- Sometimes imaging or blood tests to rule out those other causes
A doctor may also look at whether you meet criteria for a specific connective tissue disorder. If features like unusual skin fragility, a family history of aortic problems, or certain physical signs are present, a referral to a specialist such as a rheumatologist or geneticist may be recommended.
One thing that trips people up: getting a diagnosis can take time. Because there is no single test and symptoms overlap with many other conditions, some people see several doctors before the picture becomes clear.
How Does Hypermobility Syndrome Differ From Being “Double-Jointed”?
Being double-jointed is a casual term for having flexible joints. It is not a medical diagnosis. Many people who are called double-jointed have no pain and need no treatment.
The difference comes down to symptoms. If flexible joints cause pain, injuries, or interfere with daily life, that points toward hypermobility syndrome or a related condition. If they do not, it is usually just a normal variation.
| Feature | Harmless joint hypermobility | Hypermobility syndrome |
|---|---|---|
| Joint range of motion | Greater than average | Greater than average |
| Pain | Usually none | Common |
| Frequent injuries or dislocations | Uncommon | More common |
| Need for treatment | Rarely | Often helpful |
The table shows why flexibility alone is not the point. Two people can have the same Beighton score and very different experiences.
When Should You See a Doctor?
See a doctor if joint pain is affecting your daily life, if you dislocate joints often, or if you have symptoms you cannot explain. It is also worth getting checked if you have a family history of a connective tissue disorder or heart problems.
Seek medical care promptly if you have sudden severe joint pain, a joint that will not go back into place, or signs of a problem with blood vessels such as chest pain. These are not typical of common hypermobility and need urgent attention.
For most people, the goal of seeing a doctor is not to get a label but to rule out more serious conditions and to get a plan that helps with pain and function.
What Helps With Hypermobility Syndrome?
There is no cure for hypermobility syndrome, and no treatment reverses the underlying connective tissue. What helps most people is managing symptoms and protecting joints from injury.
Physical therapy is the most commonly recommended approach. The focus is usually on strengthening the muscles around unstable joints, which can improve support and reduce pain. This is widely used in clinical practice, though the quality of research evidence varies.
Other approaches that some clinicians recommend include:
- Low-impact exercise such as swimming or cycling
- Learning to avoid movements that overstretch joints
- Pain relief, guided by a doctor
- Pacing activity to avoid overuse
It is worth being honest about the evidence here. There is no strong body of large trials showing that any single treatment reliably fixes hypermobility syndrome. Much of what is recommended is based on clinical experience and on what helps similar joint and muscle problems. That does not mean it does not work — it means the research is limited, and what helps one person may not help another.
Because symptoms vary so much from person to person, a plan that is tailored to you matters more than following a general rule.
Frequently Asked Questions
Is hypermobility syndrome the same as Ehlers-Danlos syndrome?
No. Hypermobility syndrome is diagnosed when joint hypermobility causes symptoms but no specific inherited connective tissue disorder is found. Ehlers-Danlos syndrome is a group of distinct genetic conditions, some of which involve hypermobility and require different medical care.
Can hypermobility syndrome be cured?
There is no cure, because it comes from the structure of your connective tissue, which is largely inherited. Treatment focuses on managing pain and protecting joints rather than reversing the condition.
Does having flexible joints mean I have hypermobility syndrome?
No. Many people with flexible joints have no pain or other problems and do not need treatment. Hypermobility syndrome is diagnosed only when that flexibility is linked to symptoms.
How is hypermobility syndrome diagnosed?
Diagnosis is based on a physical exam, often using the Beighton score, along with your symptom history and tests to rule out other conditions. There is no single blood test that confirms it.
