Emerging Connections: POTS, MCAS, and Hypermobility – What You Need to Know

In recent years, research has pointed to a possible connection between three chronic conditions: Postural Orthostatic Tachycardia Syndrome (POTS), Mast Cell Activation Syndrome (MCAS), and Hypermobility. Patients and healthcare providers alike have noticed patterns linking these conditions, yet many individuals remain undiagnosed or unaware of the overlapping symptoms. If you or a loved one struggle with these disorders, understanding the connection between them can be could be helpful for symptom management and treatment.

The Link Between POTS, MCAS, and Hypermobility

These three conditions frequently co-occur, leading experts to explore whether they share a common underlying cause:

• POTS is a form of dysautonomia that affects the autonomic nervous system, leading to symptoms like dizziness, rapid heart rate upon standing, fatigue, and exercise intolerance. (Learn more about POTS from Dysautonomia International)
• MCAS involves an abnormal activation of mast cells, which release excessive histamine and inflammatory mediators, causing issues like flushing, hives, digestive problems, and severe allergic-like reactions. (MCAS research overview from Mast Cell Disease Society)
• Hypermobility Spectrum Disorders (HSD) and Ehlers-Danlos Syndrome (EDS) affect connective tissues, leading to joint instability, chronic pain, gastrointestinal dysfunction, and skin fragility. ( The Ehlers-Danlos Society provides more information on HSD and EDS.)

Often, individuals who have one of these conditions exhibit symptoms of another one, indicating the possibility that they may be related.

How These Conditions Overlap

1. POTS and Hypermobility

Individuals with hypermobility disorders, particularly those with hEDS (Hypermobile Ehlers-Danlos Syndrome), are at a higher risk of developing POTS. Weak connective tissues can affect blood vessels, possibly leading to blood pooling and the inability of blood vessels to tighten as they should, resulting in POTS symptoms.

2. POTS and MCAS

MCAS and POTS frequently co-exist, with research suggesting that mast cell dysfunction may contribute to autonomic instability. Many POTS patients experience palpitations, brain fog, and gastrointestinal distress—symptoms commonly seen in MCAS due to histamine release. Some individuals find that antihistamines or mast cell stabilizers help alleviate their POTS symptoms, further reinforcing this connection.

3. MCAS and Hypermobility

Hypermobility and MCAS are often seen together, and many hypermobile individuals report allergic-like reactions, chronic pain, and food sensitivities. Some researchers have proposed that inappropriate mast cell activity may disrupt the stability of connective tissues

Why This Connection Matters

Recognizing this POTS-MCAS-Hypermobility triad may lead to better, more comprehensive treatment approaches. Many patients with one condition may benefit from being screened for the others. Utilizing a multidisciplinary approach that could include cardiologists, allergists, rheumatologists, and autonomic specialists may help tailor treatment to fit the various aspects of each condition.

Managing Symptoms Across All Three Conditions

If you suspect you have a combination of these disorders, talk to your doctor about whether any of these management strategies may be right for you:

• Hydration & Electrolyte Replenishment: Since blood volume regulation may be a challenge in POTS, Oral Rehydration Solutions (ORS) like NormaLyte can be a convenient way to support regular fluid and electrolyte consumption.
• Mast Cell Stabilization: Antihistamines, cromolyn sodium, and low-histamine diets are often used to manage MCAS symptoms.
• Compression Garments & Exercise: Supportive clothing and a gradual exercise regimen (such as recumbent biking) have often been used to help with POTS symptoms.
• Gastrointestinal Support: Discussing your food intake with a dietician may help you eliminate foods that could be aggravating your condition.
• Pain Management: Physical therapy, braces, and splints are just a few of the ways to address hypermobility-related joint pain.

The Future of Research

The link between POTS, MCAS, and Hypermobility is still being explored. Patients experiencing symptoms across these conditions may benefit from seeking specialists who understand the complexity of these overlapping disorders.

By increasing awareness and encouraging a holistic, multi-system approach, we can help support individuals navigating these complex and chronic conditions.

If you have been diagnosed with POTS, MCAS, or Hypermobility, we'd love to hear your experiences! Join the conversation in the comments below or share this blog to help spread awareness about this potential health connection.