Hi I'm 16 years old and I noticed a rash near my underwear line but I didn't like much of it. Within a few hours, there were some small bumps on my wrists, stomach, armpit area, neck, and shoulder. I went to sleep but in the morning the rash had spread to my upper thigh and arms and got increasingly worse in other areas. I am not allergic to anything that I know of and I did not do anything unusual in these past few days