The “trifecta”: hEDS, POTS, and mast cell activation reported together
patient-reported patternevidence: community signalindependent evidence agrees
Patient communities often describe hEDS, POTS (a form of dysautonomia), and mast cell activation syndrome (MCAS) occurring together, and call the combination the “trifecta”. In a Global Registry survey of 505 people with hEDS, POTS and MCAS were among the diagnoses participants most often endorsed as accurate. Whether the three share a mechanism is unknown.
Not medical advice. This page summarizes research and does not recommend any course of care.
| EDS types | hEDS, HSD |
|---|---|
| Diagnostic criteria | 2017 International Classification |
| Venues | r/ehlersdanlos, EDS and HSD Support Community (Inspire) |
| Last checked | 2026-09-16 |
| Reassess by | 2026-12-16 |
Evidence
communitycross-venue pattern
Recurring across Reddit and Inspire over multiple years.
registryregistry analysis
POTS and MCAS were among the diagnoses participants most often endorsed as accurate.