A reaction to a bandage (MCAS, mast cell disease)

I don’t know if this is a Mast Cell Activation Syndrome (MCAS) thing or something else, but I just ran across this picture of how my arm reacted to a clear plastic bandage that was on my arm You can read more about it in my Diverticulitis - symptoms, testing, and treatment story if you’re interested.

The thing about this is that it was before I was diagnosed with mast cell disease. If it happened now I’d just think, “Oh well, another weird MCAS reaction,” but back then I had no idea what was going on.