Patients with Ehlers-Danlos syndrome, POTS, and mast cell activation symptoms are often sent to different specialists for different parts of the same pattern.
Cardiology may focus on racing heart or dizziness. Allergy or immunology may focus on hives, flushing, food reactions, or medication sensitivity. Orthopedics or rheumatology may focus on joint pain, instability, or widespread body pain.
Each symptom may be real and important. But when they are treated in isolation, the larger EDS-POTS-MCAS connection can be missed.
The Structural Foundation: EDS and Hypermobility
Ehlers-Danlos syndrome and hypermobility spectrum disorders affect connective tissue. Ligaments and joint capsules may not provide enough stability, so joints can move more than they should.
When that happens, muscles often tighten to protect the body. This guarding can create pain, fatigue, spasms, headaches, pelvic pain, nerve irritation, and repeated joint injuries.
The body is not simply flexible. It is working harder to stay stable.
The Autonomic Connection: POTS and Dysautonomia
Many hypermobile patients also experience dysautonomia, including POTS. Symptoms may include heart rate spikes, dizziness, lightheadedness, sweating changes, temperature sensitivity, fatigue, brain fog, poor sleep, and a sense of internal alarm.
This can happen for more than one reason. Stretchy blood vessels may allow blood to pool in the lower body when standing. Some patients may also have upper cervical instability or nerve irritation that contributes to sympathetic nervous system overactivity.
This is why POTS symptoms can feel like anxiety, even when the driver is physiological.
The Immune Layer: MCAS
Mast cells are immune cells that live in connective tissue and interact closely with the nervous system. In some patients, they become overly reactive.
Mast cell activation symptoms may include flushing, hives, itching, swelling, food intolerance, medication sensitivity, GI symptoms, burning pain, and inflammatory flares.
Mechanical stress, pain, temperature changes, and sympathetic nervous system activation can all contribute to flares. This creates a cycle: instability stresses the body, the nervous system becomes more reactive, mast cells become more reactive, and inflammation can worsen the pain pattern.
What a Proper Workup Requires
A proper workup should look at the full pattern, not one symptom at a time.
It should ask: Is there joint instability? Are there POTS symptoms? Are there mast cell activation symptoms? Is the nervous system stuck in fight-or-flight? Is inflammation making the connective tissue and pain pattern worse?
Treatment often needs to be sequenced carefully: calm inflammation, regulate the nervous system, then address structural instability.
Our Approach at MPM
At Manhattan Pain Medicine, we evaluate EDS, POTS, and MCAS as overlapping systems, helping patients move beyond scattered labels toward a clearer, more coordinated understanding of their symptoms.
