Insecurities. (Body wise)

Does anyone else get insecure about things on their bodies they wish the can control? Like I can wax my hair, and I can control my weight, and shape, but I can't seem to control when/where I have a hive break out! It leaves scars, it looks ugly and it's always in the most unconvenient of places. (Like at the meeting on my thigh and buttcrease) how am I suppose to sit without irritating it further? Better yet how am I suppose to have intercourse with out having something like that in the back of me mind? I feel so unattractive.