Every time I get hot I start to get a rash under my arms, around my waist, my legs, and the back of my knees. If I go somewhere to cool off the rash simply goes away, if I stay in the hot area the rash will continue for 10-30 minutes then dissipate. I get dizzy when this happens, however, doctors tested me for lyme disease, my vitamin levels, and this has been happening for a couple months. I cannot seem to figure out whats causing it, doctors just tested me for IBS as well, and that came back fine.
Can anyone give me some advice or help. Here is a link to a picture of my rash. Again I was hot and it started to happen on my arms.