POTS, dysautonomia and autonomic–GI overlap

What records in this area tend to contain

These are descriptions of records, not diagnostic criteria. Recognising several of them does not mean you have a condition, and none of them is being asserted about you.

• Postural tachycardia, presyncope, or orthostatic intolerance documented or suspected
• Symptoms worsening after meals, in heat, or with menstrual cycle timing
• Hyperadrenergic features — tremor, surges, anxiety-like episodes with a physiological trigger
• Gastroparesis-type or constipation-dominant GI symptoms alongside the autonomic picture
• Onset after infection, surgery, pregnancy, or a period of immobility
• Overlap with reactivity, hypermobility, or post-viral findings

The analytical work on a case like this

• Autonomic chronology against infectious, surgical, hormonal and deconditioning events
• Volume, vascular, and adrenergic contributions the record supports or excludes
• Gut–autonomic coupling: splanchnic pooling, post-prandial physiology, motility effects
• Mast cell and immune overlap where reactivity accompanies the autonomic pattern
• Iron, thyroid, adrenal and medication contributors that mimic or amplify the picture
• Which prior interventions changed the physiology and which only changed the symptom

What the work is trying to answer

These are the questions the reconstruction is built around. They are questions, not promises — some records answer them clearly and some do not, and the written synthesis says which.

• Which autonomic subtype does the record most support, and what argues against it?
• Is the GI picture a consequence of autonomic dysfunction, a driver of it, or both?
• What triggered the transition from healthy to dysautonomic, if the record can say?
• Which mechanistic questions would most improve your physician's next decision?

What would argue against the leading reading

Every synthesis states the alternatives it could not exclude. For this area, the most important ones are:

• Deconditioning and hypovolaemia, which are common, treatable, and frequently under-weighted
• Anaemia, thyroid dysfunction, or medication effects producing an orthostatic picture
• Anxiety disorders, which can coexist with and be amplified by genuine autonomic instability
• Primary GI disease producing autonomic-looking post-prandial symptoms
• A structural or neurological cause requiring specialist assessment rather than mechanistic reasoning

Related reading on this site

• The hEDS–POTS–MCAS triad
• Long COVID and post-viral illness
• MCAS that doesn't respond to standard treatment

• Long COVID and post-infectious syndromes

  For illness that began with an infection and did not end with it, where the honest position is several competing hypotheses rather than one story.

• Neuroimmune and small-fiber patterns

  For burning, numbness and autonomic sensory change with equivocal testing, where the neurological and immune readings have never been reconciled.

• hEDS, hypermobility and autonomic–GI overlap

  For hypermobility with dysautonomia, dysmotility and reactivity, where three labels exist and no explanation connects them.

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