• Welcome to Phoenix Rising!

    Created in 2008, Phoenix Rising is the largest and oldest forum dedicated to furthering the understanding of and finding treatments for complex chronic illnesses such as chronic fatigue syndrome (ME/CFS), fibromyalgia (FM), long COVID, postural orthostatic tachycardia syndrome (POTS), mast cell activation syndrome (MCAS), and allied diseases.

    To become a member, simply click the Register button at the top right.

HR surges after meals - blood sugar or MCAS?

Husband of

Senior Member
Messages
313
This sounds like my experience with COVID (including now, four weeks in, though ti a lesser extent to what it was in previous weeks). So I'd guess whatever the reason it's what happens when you are sick, and the reason you are noticing it now is that you are more sick than you used to be)
My experience wouldn't be inconsistent with thermos blood volume theory though, if COVID made me dehydrated. I am often dehydrated generally so it seems likely