<human>: Can you provide a brief rundown of the text in within 3 sentences?

First off I'll say that I began dieting and making healthier choices because my doctor said I was dangerously close to having to take cholesterol pills. At the age of 24. So I said "screw that" and began dieting the very next day. 40lbs down so far.

I try to exercise as much as possible (I swim a lot during the summer), walk... slowly, but apparently I have miliaria profunda (??). So anytime I get hot or try to sweat, my skin breaks out into a rash and feels like someone is running a blowtorch up and down my body and I get heart palpitations. Any time I help lift a couch or run around for too long. It's awful. I am not sure if this happened after puberty (don't remember it happening before then) or what, but it's ridiculous and painful and I risk having a heat stroke.

I don't want to be like this but there's no treatment besides "don't get hot" and... I don't want to be fat. I am actually trying here. I am losing the weight, but the weight I lose then turns to flab when the fat disappears. Are there any suggestions for me? At all? Is anyone else like me?
I know everyones body is different, but it's worth a shot.

Thanks so much in advance if anyone can help.
<bot>: I am unable to sweat due to medical reasons but I really want to lose weight without having to suffer too much from the pain of my body trying to. Please help?