Joint Hypermobility: Causes, Symptoms, Diagnosis, and Treatment

What is Joint Hypermobility?

Joint hypermobility is a medical term describing the ability of one or more joints to move beyond the normal range of motion. In everyday language, people with this condition are often described as being “double-jointed”.

In most cases, joint hypermobility does not represent a pathological condition in itself and does not necessarily require specific treatment. However, it may cause mild but bothersome symptoms such as joint pain or a sensation of instability, with an increased risk of joint dislocation.

When joint hypermobility is associated with other systemic symptoms, it falls within a broader group of clinical entities known as hypermobility spectrum disorders (HSD), conditions sharing this hallmark feature but differing in severity and associated findings.

Important distinction: Hypermobility spectrum disorders must be carefully differentiated from Ehlers-Danlos Syndrome (EDS), a hereditary connective tissue disorder characterized not only by marked joint hypermobility but also by increased skin elasticity and generalized fragility of connective tissues, with potentially serious systemic health consequences.

Classification by Distribution

Joint hypermobility is classified according to the number and location of affected joints:

• Localized – affecting a single joint
• Peripheral – involving only the joints of the hands and feet
• Generalized – affecting multiple joints distributed throughout the body

Main Causes

• Genetic and hereditary – due to mutations in specific genes affecting connective tissue proteins such as collagen
• Acquired – resulting from trauma, sprains, or dislocations with abnormal healing

Associated Symptoms

Depending on the underlying cause, joint hypermobility may be accompanied by:

• Pain in major joints
• Sensation of joint instability
• Scoliosis or other spinal disorders
• Sprains and dislocations
• Injuries to supporting joint structures (ligaments, capsule)
• Extremely lax or hyperelastic skin
• Rheumatological symptoms

Diagnosis

The diagnosis of joint hypermobility is established through medical history and physical examination. The Beighton scoring system is the standardized tool used to objectively quantify hypermobility.

Treatment Overview

Joint hypermobility, when present as an isolated finding without pathological implications, does not require specific medical treatment. Management is aimed at relieving symptoms (primarily pain) and preventing complications through physiotherapy, targeted exercise, and, when necessary, pharmacological support.

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Anatomy of Joints: A Brief Overview

A joint (or articulation) is an anatomical structure where two or more bones come into contact and are held together through their cartilaginous surfaces and surrounding connective tissue structures (ligaments, joint capsule, tendons).

Joints are classified according to the type of movement they allow:

Mobile joints (diarthroses) are primarily responsible for movement, while semi-mobile and fixed joints provide structural stability rather than movement.

The range of motion (ROM) of a joint is influenced by multiple factors including the geometry of the articular surfaces, the elasticity of the joint capsule and ligaments, muscular tension, and, critically, the intrinsic properties of connective tissue proteins such as collagen and elastin. Alterations in these proteins are at the root of most forms of joint hypermobility.

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Causes

The causes of joint hypermobility are most commonly hereditary, resulting from specific mutations in genes encoding structural proteins of connective tissue. For example:

• Mutations affecting collagen synthesis or structure (types I, III, V) result in more lax ligaments and joint capsules, allowing a greater range of movement.
• Mutations in genes encoding fibrillin, tenascin, or other extracellular matrix proteins can produce similar effects.

These genetic alterations not only cause hypermobility but may also underlie a spectrum of additional symptoms affecting skin, blood vessels, and other organ systems.

Acquired Causes

Hypermobility can also be acquired as a result of:

• Distortion or sprain of a joint
• Dislocation or subluxation
• Direct trauma from a fall or sports injury

In these cases, hypermobility is secondary and localized to the injured joint, resulting from abnormal healing of ligaments or the joint capsule with development of chronic joint instability.

Note: Acquired joint hypermobility differs fundamentally from congenital forms in that it is typically unilateral and limited to the traumatized joint, whereas hereditary forms tend to be bilateral and generalized.

Classification

Joint hypermobility can be classified according to distribution:

• Localized (LJH – Localized Joint Hypermobility): Limited to a single joint or up to 5 joints.
• Peripheral (PJH – Peripheral Joint Hypermobility): Present only at the level of hands and feet; often observed in children.
• Generalized (GJH – Generalized Joint Hypermobility): Involving more than 5 joints, distributed throughout the body; may be congenital or acquired.

It may also be classified according to clinical status:

Asymptomatic hypermobility, subdivided into:

• LJH – up to 5 joints affected
• GJH – more than 5 joints, congenital or acquired
• PJH – limited to hands and feet, common in children
• HJH (Historical Joint Hypermobility) – mainly in elderly individuals who have lost their hypermobility over time but retain its consequences

Symptomatic hypermobility, which falls within the hypermobility spectrum disorders, including the hypermobile type of Ehlers-Danlos Syndrome (hEDS).

Transient joint hypermobility refers to an increased range of motion acquired through prolonged, intense athletic training. It is considered transient because it depends on the individual’s physical conditioning and may diminish if specific training ceases. Classic examples include gymnasts, ballet dancers, martial artists, and circus performers.

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Symptoms

Joint hypermobility is in itself a clinical sign, the ability to perform movements exceeding the normal articular range. However, associated symptoms may be present, particularly when hypermobility occurs within the context of hypermobility spectrum disorders or Ehlers-Danlos Syndrome.

Age and Sex Dependency

Primary congenital hypermobility is strongly age- and sex-dependent:

• It is most pronounced in children and young adults.
• It is significantly more common in females than males.
• It tends to decrease with age as muscle tone, cartilage stiffness, and ligament tension naturally increase.

Common Symptoms

• Joint pain, typically accentuated at the knees, wrists and hands, ankles, shoulders, and elbows
• Sensation of joint instability
• Increased incidence of scoliosis or other spinal disorders
• Tendency toward subluxation after certain movements
• Increased risk of dislocation or sprain
• Injuries to ligaments, joint capsule, and other supporting connective tissue structures
• Extremely elastic and lax skin
• Rheumatological symptoms
• Fatigue and general malaise

Complications in Ehlers-Danlos Syndrome

In patients with Ehlers-Danlos Syndrome, beyond joint hypermobility, serious late-stage complications may develop, including:

• Fragility of blood vessels, leading to increased risk of cerebrovascular accidents (stroke)
• Formation of vascular aneurysms
• Prolapse of heart valves (particularly the mitral valve)
• Urinary incontinence
• Arterial hypertension
• Cardiac disease
• Ocular problems (lens dislocation, retinal detachment, myopia)

These complications underline the importance of distinguishing isolated benign hypermobility from syndromic forms requiring comprehensive multidisciplinary management.

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Diagnosis

Individuals with joint hypermobility accompanied by rheumatological or systemic symptoms should seek medical evaluation for proper diagnostic workup.

Step 1 – Medical History (Anamnesis)

The first diagnostic step involves a thorough medical interview to reconstruct the patient’s recent and past clinical history. Key areas to investigate include:

• Family history of joint hypermobility in first-degree relatives
• Family history of Ehlers-Danlos Syndrome or similar connective tissue conditions
• History of recurrent joint dislocations or sprains
• Tendency to develop joint or periarticular injuries following minor trauma
• Presence of other underlying medical conditions
• Prior surgical procedures

Step 2 – Physical Examination

The physical examination aims to objectively identify signs of hypermobility. The examining physician will assess the principal joints and look for movements clearly exceeding the expected range, such as:

• Hyperextension of the knee (genu recurvatum)
• “Saber-knee” appearance when viewed laterally
• Ability to touch the forearm with the thumb
• Passive hyperflexion of the fingers onto the back of the hand

When hypermobility is identified in one joint without a clear traumatic cause, the examination must be extended to all other major joints, including the use of specialized instruments such as an orthopedic goniometer to measure joint angles precisely.

Step 3 – The Beighton Score

Joint hypermobility is objectively quantified using the Beighton Scoring System, the most widely used and validated clinical tool for this purpose.

The scale evaluates 5 specific movements (4 passive, 1 active), with scores ranging from 0 to 9:

A score of 4 or above (out of 9) is considered indicative of generalized joint hypermobility in adults. Different cutoff scores may apply to children and the elderly.

Differential Diagnosis

The diagnosis of hypermobility spectrum disorders is typically a diagnosis of exclusion. This means that a patient with joint hypermobility and associated symptoms receives this diagnosis only after investigations for the following conditions have yielded negative results:

• Ehlers-Danlos Syndrome (EDS)
• Marfan Syndrome and other collagenopathies
• Fabry disease
• Osteogenesis imperfecta
• Stickler syndrome
• Skeletal dysplasias
• Other rare genetic syndromes

Genetic testing, echocardiography, ophthalmological evaluation, and rheumatological assessment may be required to rule out these conditions.

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Treatment

Joint hypermobility as an isolated condition without pathological implications does not require specific medical treatment. Management is individualized based on symptoms, severity, and associated conditions.

For hypermobility spectrum disorders, symptom management follows an approach similar to that used in Ehlers-Danlos Syndrome, with emphasis on preventing potential complications over time.

Pharmacological Treatment

Medications may be used to relieve specific symptoms:

• Over-the-counter analgesics, such as Paracetamol (Acetaminophen), Ibuprofen, Naproxen, and similar NSAIDs, to relieve pain in the most stressed joints.
• Antihypertensive medications – to reduce and control blood pressure in conditions such as Ehlers-Danlos Syndrome, where intrinsic vascular fragility significantly increases the risk of cerebrovascular events.

Note: Long-term use of NSAIDs should always be discussed with a physician due to potential gastrointestinal and cardiovascular side effects.

Physiotherapy

Physiotherapy is a cornerstone of management for joint hypermobility, primarily serving a preventive and functional role. Goals include:

• Toning and strengthening the muscular groups surrounding hypermobile joints
• Stabilizing joint mechanics and defining correct movement vectors, particularly for joints prone to instability (shoulder, wrist, hip, knee)
• Proprioceptive training to improve body awareness and reduce the risk of inadvertent injury
• Reducing pain through targeted exercise programs

A personalized physiotherapy program should be designed and supervised by a qualified physiotherapist with experience in connective tissue disorders.

Recommended Physical Activities

In addition to formal physiotherapy, the following activities are generally beneficial and safe for individuals with joint hypermobility:

• Swimming – low-impact, whole-body conditioning without axial joint loading
• Pilates – focuses on core stability, postural control, and controlled movement
• Stretching programs – to maintain flexibility without overstressing joints
• General aerobic exercise (walking, cycling) – improves cardiovascular fitness and overall muscle tone

Activities involving high-impact, contact sports, or extreme ranges of motion (trampolining, heavy weightlifting, contact martial arts) should be approached with caution and only under medical supervision.

Prevention Strategy

The primary goal of management is to prevent the most common complications associated with hypermobility:

• Onset and chronification of joint pain
• Subluxations and dislocations
• Joint sprains
• Capsular or ligamentous injuries

Protective measures may also include the use of orthopedic braces or supports for the most vulnerable joints (wrists, knees, ankles) during physical activity.

Surgical Treatment

Surgical intervention is reserved for rare cases involving significant complications such as:

• Severe osteo-cartilaginous lesions
• Chronic, refractory joint instability unresponsive to conservative management
• Recurrent dislocations causing functional disability

Surgery aims to repair or reconstruct damaged supporting structures (ligament reconstruction, capsular tightening), but outcomes must be carefully weighed, particularly in patients with underlying connective tissue disorders, as healing may be impaired.

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Sources and Bibliography

• Baban A, Castori M. Pharmacological resources, diagnostic approach and coordination of care in joint hypermobility-related disorders. American Journal of Medical Genetics Part C: Seminars in Medical Genetics. 2018. PubMed
• Castori M, Tinkle B, Levy H, Grahame R, Malfait F, Hakim A. A framework for the classification of joint hypermobility and related conditions. American Journal of Medical Genetics Part C. 2017. PubMed
• Grahame R. Joint hypermobility and genetic collagen disorders: are they related? Archives of Disease in Childhood. 1999;80(2):188–191.
• Hakim A, Grahame R. Joint hypermobility. Best Practice & Research Clinical Rheumatology. 2003;17(6):989–1004.
• Tinkle B, et al. Hypermobile Ehlers-Danlos Syndrome (a.k.a. Ehlers-Danlos Syndrome Type III and Ehlers-Danlos Syndrome Hypermobility Type): Clinical description and natural history. American Journal of Medical Genetics Part C. 2017;175(1):48–69.
• Beighton P, Solomon L, Soskolne CL. Articular mobility in an African population. Annals of the Rheumatic Diseases. 1973;32(5):413–418.
• Malfait F, et al. The 2017 International Classification of the Ehlers-Danlos Syndromes. American Journal of Medical Genetics Part C. 2017;175(1):8–26.
• NHS. Joint hypermobility. nhs.uk
• Mayo Clinic. Ehlers-Danlos Syndrome – Symptoms and Causes. mayoclinic.org