Beyond Flexibility: A Genetic Counselor's Guide to Hypermobility

Most people who land on this page have been flexible their whole life. Maybe you were the kid who could fold yourself into a pretzel at slumber parties. Maybe you've been told you have "great flexibility" or "loose ligaments." Or maybe you've spent years dealing with joint pain, fatigue, GI problems, dizziness, and the feeling that something is connected even if no provider has been able to tell you what.

Hypermobility on its own is common and often harmless. But for some people, it is the most visible feature of a connective tissue disorder that affects much more than the joints.

This guide is written for the people who are wondering whether their flexibility is telling them something. We will walk through what hypermobility is, when it warrants a closer look, what a genetic counselor actually evaluates, and what genetic testing can and cannot do.

What is hypermobility?

Hypermobility describes joints that move beyond the typical range of motion. It can affect a few joints (localized) or many joints throughout the body (generalized). Generalized joint hypermobility is more likely to be associated with a heritable connective tissue disorder.

Clinicians typically use the Beighton score as a screening tool. It is a nine-point scale that checks for:

• Pinky finger bending past 90 degrees (one point per hand)

• Thumb that can touch the inner forearm (one point per side)

• Elbows that hyperextend past 10 degrees (one point per side)

• Knees that hyperextend past 10 degrees (one point per side)

• Ability to place palms flat on the floor with straight legs (one point)

  
  

A score of 5 or higher in adults, or 6 or higher in children, suggests generalized joint hypermobility. It is a starting point for evaluation, not a diagnosis on its own.

The spectrum from benign hypermobility to hEDS

Not everyone with hypermobility has a connective tissue disorder. The clinical framework that most genetic counselors and rheumatologists use today comes from the 2017 International Classification of Ehlers-Danlos Syndromes and Hypermobility Spectrum Disorders. It places symptomatic hypermobility on a spectrum:

• Asymptomatic generalized joint hypermobility. Bendy, with no joint pain, instability, or related symptoms. Often a feature, not a problem.

• Hypermobility spectrum disorders (HSD). Hypermobility with symptoms such as joint pain, instability, or dislocations that does not meet the specific criteria for hypermobile EDS. HSD can be just as functionally significant as hEDS.

• Hypermobile Ehlers-Danlos syndrome (hEDS). The most common EDS subtype, characterized by generalized joint hypermobility, specific systemic features, family history, and exclusion of other conditions.

• Other EDS subtypes. There are 13 recognized subtypes of EDS in the current classification. Many have known genetic causes and significant systemic involvement, including vascular EDS, classical EDS, kyphoscoliotic EDS, and rarer subtypes affecting cardiovascular, ocular, and dermatologic systems.

  
  

The Ehlers-Danlos Society's Road to 2026 initiative is currently updating these criteria based on emerging research suggesting that hEDS and HSD may exist on a shared biological spectrum rather than as two distinct categories. The framework patients and clinicians use to navigate these diagnoses is actively evolving.

Signs that hypermobility may be more than flexibility

A connective tissue disorder rarely shows up as joint symptoms alone. The patterns we look for in a connective tissue evaluation include:

• Joints that dislocate or subluxate easily, or chronic joint pain starting in childhood or the teen years

• Skin that bruises easily, scars atypically, or feels unusually soft or stretchy

• Frequent sprains, "growing pains," or a history of clumsiness and recurrent injuries

• GI symptoms including reflux, slow motility, gastroparesis, or functional GI disorders

• Autonomic symptoms including POTS, lightheadedness on standing, exercise intolerance, or temperature regulation issues

• Mast cell activation symptoms including flushing, hives, food sensitivities, or anaphylactic-type episodes

• Pelvic floor concerns, organ prolapse, or hernias

• A family history of similar patterns, often dismissed across generations as "just being flexible"

  
  

If you recognize yourself in several of these, a genetic counseling evaluation is a reasonable next step.

What a connective tissue genetic counseling consult looks like

A connective tissue consult is more involved than ordering a test. In a typical session at Empower Genetics, we work through:

• A full symptom history across body systems, not just joints

• A Beighton score and a review of additional connective tissue features

• A detailed family history across three generations to look for inherited patterns

• A discussion of whether and which genetic testing makes sense for your specific situation

• Differential considerations, including ruling in or out other heritable connective tissue and overlapping disorders

  
  

The goal is to build a complete picture of what is happening and to help you understand what we can and cannot answer with the tools currently available.

What genetic testing for EDS can and cannot tell you

This is one of the most misunderstood pieces of an EDS evaluation. Here is the honest picture:

• For hypermobile EDS, there is currently no validated genetic test. The diagnosis is made clinically based on the 2017 International Classification criteria. Hypermobility spectrum disorder is similarly a clinical diagnosis.

• For most other EDS subtypes, including classical, vascular, kyphoscoliotic, dermatosparaxis, classical-like, spondylodysplastic, musculocontractural, myopathic, periodontal, cardiac-valvular, arthrochalasia, and brittle cornea, there are identified genes and clinical testing is available.

• Genetic testing is most useful when the clinical picture suggests an EDS subtype other than hEDS, or when there are red flags such as a personal or family history of vascular events, severe skin fragility, or scoliosis with marked hyperextensibility.

• Testing can also help rule out other heritable connective tissue disorders that overlap with EDS, such as Marfan syndrome and Loeys-Dietz syndrome.

  
  

Many patients come to us asking for "the EDS test." Part of our job is helping you understand what tests exist, which are appropriate for your clinical picture, and what a result will or will not change.

Why the diagnostic delay is so long

Patients with EDS and HSD often wait 10 to 12 years for a diagnosis. There are real reasons for this. The symptoms are multisystem. The specialists who treat each individual piece rarely have the time or framework to zoom out. And hEDS has no biomarker, which means it cannot be confirmed by a lab.

The delay is not a reason to wait longer. It is a reason to seek a clinician trained to look at the whole picture.

A genetic counselor cannot make every diagnosis. We work alongside rheumatologists, geneticists, cardiologists, and primary care providers. What we can do is bring genetic expertise, a systems-level view, and a clear assessment of whether testing is appropriate and what your next steps should be.

Working with Empower Genetics

Empower Genetics is a direct-pay telehealth genetic counseling practice licensed in multiple states. Connective tissue evaluations are part of our core scope, alongside hereditary cancer, cardiovascular genetics, pharmacogenomics, and preconception care. No waitlists and no physician referral is required.

If you have read this far and recognize yourself in any of it, that is reason enough to schedule a 10-minute discovery call. We will help you decide whether a full consult is the right next step, what to expect, and how to make the most of your time.

This article is for general educational purposes only and is not medical, genetic, or legal advice. Reading it does not establish a patient-provider relationship with Empower Genetics. If you have specific concerns about your health, symptoms, or family history, please schedule a consultation with a qualified genetic counselor or other healthcare provider.