Exploring the Connections Between EDS, MCAS, and POTS in Neurodivergence and Autism

Understanding the overlap between Ehlers-Danlos Syndrome (EDS), Mast Cell Activation Syndrome (MCAS), and Postural Orthostatic Tachycardia Syndrome (POTS) is crucial, especially when these conditions appear alongside neurodivergence and autism. These disorders often confuse healthcare providers, leading to misdiagnosis or delayed treatment. Drawing on insights from Taming the Zebra and the Ehlers-Danlos Society, this post clarifies how these conditions relate and why awareness matters for neurodivergent and autistic individuals.

What Is EDS, MCAS, and POTS?

Ehlers-Danlos Syndrome (EDS) is a group of genetic connective tissue disorders characterized by joint hypermobility, skin elasticity, vein disease, and tissue fragility. It affects collagen production, which is vital for skin, joints, and blood vessels.

Mast Cell Activation Syndrome (MCAS) involves the inappropriate activation of mast cells, which release chemicals like histamine causing inflammatory symptoms. This can lead to a variety of reactions including allergy symptoms, unmanageable chronic pain, food or medication intolerance, rash or hives, GI upset.

Postural Orthostatic Tachycardia Syndrome (POTS) is a form of dysautonomia where the autonomic nervous system fails to regulate blood flow properly, causing rapid heartbeat, dizziness when standing, and chronic fatigue.

These conditions often coexist as a trifecta, creating complex health challenges.

How These Conditions Overlap

The Ehlers-Danlos Society notes that numerous individuals with EDS also experience symptoms of MCAS and POTS. This overlap is not coincidental:

• Connective tissue abnormalities in EDS can impact blood vessels and nerves, leading to POTS symptoms such as blood pooling and heart rate irregularities.

• Mast cells reside in connective tissues, so their dysfunction in MCAS may be connected to the abnormal connective tissue environment in EDS.

• Connective Tissue & Nerves: As connective tissue supports the nervous system, structural variations might affect the brain's perception of bodily signals (proprioception and interoception).

• The autonomic nervous system irregularities in POTS can exacerbate EDS symptoms by triggering mast cell activation.

• Symptom Overlap: Both autism and the Triad exhibit high rates of gastrointestinal distress, chronic pain, immune issues, and sensory processing differences.

This triad often creates a cycle of symptoms that can be challenging to manage without specialized knowledge.

This infographic from The Ehlers-Danlos Society illustrates the wide variability of symptoms experienced across the Hypermobility Spectrum Disorder (HSD) spectrum. The diagram compares two hypothetical individuals with HSD using visual spectrum charts to show how symptom severity and presentation can differ significantly from person to person. Symptoms represented include joint instability, mast cell activation syndrome (MCAS), pain, fatigue, gastrointestinal (GI) issues, dysautonomia, headaches, and anxiety. The visual highlights that HSD is not a “one-size-fits-all” condition, and that individuals may experience very different combinations and intensities of symptoms despite sharing the same diagnosis. Graphic and educational resource courtesy of The Ehlers-Danlos Society. (ehlers-danlos.com)

The Link to Neurodivergence and Autism

Research and patient reports suggest a higher prevalence of EDS, MCAS, and POTS among autistic and neurodivergent individuals. The reasons are still being studied, but several theories exist:

• Genetic factors may predispose individuals to both connective tissue disorders and neurodevelopmental differences.

• Autonomic nervous system dysfunction is common in autism and may overlap with POTS symptoms.

• Sensory processing differences in autism can amplify the physical discomfort caused by EDS, MCAS, and POTS.

  
  

Understanding this connection helps explain why many neurodivergent people experience complex, multisystem health issues that are often misunderstood.

Challenges in Diagnosis and Treatment

Many healthcare providers lack training on the cooccurrence of these conditions, especially in neurodivergent patients. This leads to:

• Misdiagnosis or dismissal of symptoms as psychological or unrelated.

• Fragmented care, where specialists focus on one condition without considering the others.

• Delayed treatment, increasing the risk of complications and reduced quality of life.

  
  

Patient advocacy groups like Taming the Zebra emphasize the importance of listening to patients and recognizing patterns across these conditions.

Practical Tips for Patients and Providers

For those navigating these overlapping conditions, here are some practical steps:

• Keep detailed symptom logs to help providers see patterns.

• Seek specialists familiar with EDS, MCAS, and POTS, ideally those who understand neurodivergence.

• Advocate for comprehensive care that addresses all symptoms, not just isolated issues.

• Use resources from trusted organizations like the Ehlers-Danlos Society and Taming the Zebra for education and support.

  
  

Providers should consider screening for these conditions when neurodivergent patients present with unexplained symptoms like dizziness, unmanageable pain, or allergic reactions.

Moving Forward with Awareness and Support

Recognizing the connections between EDS, MCAS, and POTS within neurodivergent and autistic communities is a step toward better care. These conditions are complex but manageable with the right approach. Increased awareness among healthcare providers can reduce misdiagnosis and improve patient outcomes.

If you or someone you know is navigating these challenges, consider reaching out to specialized support groups and medical professionals who understand the full picture. Sharing experiences and knowledge helps build a stronger community and better healthcare for everyone affected.