Hypermobility Spectrum Disorders

Overview

Hypermobility spectrum disorders (HSD) describe conditions in which some or all joints move beyond their normal range, and this looseness leads to symptoms such as pain, instability, and frequent strains. Many people have flexible joints without any problems, which is simply benign joint hypermobility. HSD is diagnosed when the hypermobility is linked to ongoing symptoms that affect daily life.

HSD sits on a spectrum with the hypermobile form of Ehlers-Danlos syndrome, and the two can share many features. The conditions are thought to involve differences in connective tissue that make ligaments and other supporting structures looser than usual. While there is no cure, the right combination of physical therapy, joint protection, and lifestyle measures helps many people manage symptoms and stay active.

Symptoms

Symptoms vary widely and can affect more than just the joints:

• Joints that bend further than normal, sometimes able to do party tricks
• Chronic joint and muscle pain, often widespread
• A feeling of joint instability or that a joint may give way
• Frequent sprains, strains, or partial dislocations
• Fatigue and reduced stamina
• Soft, stretchy skin and easy bruising in some people
• Lightheadedness on standing, and digestive symptoms in some individuals

Symptoms often begin in childhood or adolescence and can fluctuate over time.

Causes

Hypermobility spectrum disorders are believed to result from differences in connective tissue:

• Connective tissue variation: Looser ligaments and supporting tissues allow joints to move too far.
• Genetic influence: Hypermobility frequently runs in families, suggesting an inherited component, though a single specific gene is not usually identified in HSD.
• Muscle support: When muscles around loose joints are weak or deconditioned, instability and pain can worsen.

HSD is distinguished from defined genetic connective tissue disorders such as Ehlers-Danlos syndrome and Marfan syndrome, which have additional specific features.

Risk Factors

• A family history of joint hypermobility
• Younger age, as flexibility tends to be greater in youth
• Female sex, with symptoms reported more often in women
• Activities that repeatedly stress loose joints
• Reduced muscle conditioning around the joints

Diagnosis

Diagnosis is clinical, based on assessing joint flexibility and linking it to symptoms:

• Hypermobility assessment: A scoring system (such as the Beighton score) measures how far certain joints bend.
• Symptom review: Confirming that pain, instability, or injuries are connected to the hypermobility and affect daily life.
• Excluding other conditions: Ruling out defined disorders like Ehlers-Danlos syndrome and other causes of joint and tissue problems.
• Examination: Checking skin, joints, and for signs that point to a specific syndrome.

There is no single blood test for HSD; the diagnosis is made by an experienced clinician using these features together.

Treatment

Management is supportive and aims to reduce pain, improve stability, and maintain function:

• Physical therapy: The cornerstone of care, focusing on strengthening the muscles that stabilize joints and improving control and posture.
• Joint protection: Learning to avoid overextending joints, sometimes with bracing or supports.
• Pacing and activity management: Balancing activity and rest to manage pain and fatigue.
• Pain management: A combination of exercise, simple pain relief, and other strategies tailored to the person.
• Managing related symptoms: Addressing issues such as lightheadedness or digestive symptoms when present.

A gradual, consistent approach generally works better than rest alone, as strengthening helps support the loose joints.

Prevention

• Keep the muscles around the joints strong with regular, low-impact exercise
• Avoid pushing joints into extreme positions
• Use good technique and supportive footwear during activity
• Pace activities to prevent flare-ups of pain and fatigue
• Seek physical therapy guidance for a tailored program

When to See a Doctor

See a doctor if flexible joints are causing ongoing pain, frequent injuries, or a sense of instability that affects daily life. Also seek care if you have:

• A joint that has fully dislocated, which needs prompt treatment
• Symptoms suggesting a defined connective tissue disorder, such as severe skin fragility or a family history of arterial or eye problems
• Fainting, marked lightheadedness, or persistent digestive symptoms

A proper assessment can confirm the diagnosis, rule out other conditions, and connect you with physical therapy and support.

Related Topics

Frequently Asked Questions

References

1. The Ehlers-Danlos Society.
2. MedlinePlus, U.S. National Library of Medicine.
3. National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS).
4. Merck Manual. Joint Hypermobility.