Is There a Genetic Test for Hypermobile EDS (hEDS)?

Currently, there is no genetic or blood test that can prove you have hypermobile Ehlers-Danlos Syndrome (hEDS) ^[1][2]. While researchers have identified the specific genetic mutations responsible for most other types of Ehlers-Danlos Syndrome (EDS), the exact gene or genes that cause hEDS have not yet been discovered ^[3][1]. Because of this, hEDS remains a strictly clinical diagnosis—meaning it is identified through a physical exam (such as the Beighton Score for joint flexibility), your medical history, and your family history rather than a lab result ^[4][2].

You might still be offered genetic testing, which can be confusing. If there is no test for hEDS, why would your doctor order a genetic panel?

Why Genetic Testing is Used in hEDS Evaluation

To be officially diagnosed with hEDS, your doctor must evaluate you against the 2017 international diagnostic criteria, which consist of three main parts:

1. Generalized joint hypermobility (Criterion 1) ^[5].
2. Systemic signs (like stretchy skin or certain body proportions) or a family history of hEDS (Criterion 2) ^[5].
3. Ruling out other conditions that might look like hEDS (Criterion 3) ^[5][6].

Criterion 3 is where genetic testing sometimes comes in. Many connective tissue disorders share similar symptoms, such as flexible joints, fragile skin, and chronic pain ^[7][8]. If your doctor notices “red flag” symptoms—such as a personal or family history of unexpected blood vessel ruptures, extremely fragile skin, or heart issues—they may order a connective tissue gene panel (usually a simple blood draw or saliva test) ^[9][7].

Important: Genetic testing is not strictly mandatory to get an hEDS diagnosis. If you do not have any red flags for other disorders, your doctor can often rule them out purely through a clinical evaluation ^[5][8].

If a test is ordered (often by a geneticist, rheumatologist, or specialized primary care doctor), they are looking for mutations in specific genes, such as:

• COL5A1 and COL5A2: Mutations in these genes cause Classical EDS, which involves extreme skin fragility and widening scars ^[10][7].
• COL3A1: Mutations in this gene cause Vascular EDS, a rare and serious type that can lead to organ and blood vessel ruptures ^[10][7].
• FBN1: Mutations in this gene cause Marfan syndrome, which can also cause hypermobility but often involves specific heart and eye complications ^[9][7].

If a genetic panel comes back completely negative for these and other known mutations, it does not mean you don’t have EDS. Instead, a negative result simply rules out those specific rarer types ^[9][6]. If you also meet the clinical criteria, this negative test actually helps confirm an hEDS diagnosis by satisfying the requirement to rule out other disorders ^[5][11]. If you don’t meet the strict criteria for hEDS but still have symptomatic joint hypermobility, you may receive a diagnosis of Hypermobility Spectrum Disorder (HSD), which is managed very similarly ^[12][13].

The Future of hEDS Genetic Testing

The lack of a specific genetic marker for hEDS often leads to a frustrating diagnostic journey ^[14][2]. Without a definitive blood test, some patients feel their symptoms are dismissed or that it takes much longer to get answers ^[14][8].

However, major research efforts are currently underway to find the genetic cause of hEDS. For example, the Hypermobile Ehlers-Danlos Genetic Evaluation (HEDGE) study is actively analyzing the DNA of thousands of people with hEDS to identify the underlying genetic mechanisms ^[3]. Until a genetic marker is found, relying on a careful clinical evaluation by a knowledgeable healthcare provider remains the standard of care.