question: I woke up with a strange rash on both sides of my waist. it leads from my hips to just under my breast region. They are red, painful bumps. They do not itch, but they are so sensitive that it hurts when my pants or shirt rub it wrong. Could it be because I was in my hot tub and didn't shower before I went to bed? I go in my hot tub every night but I was too tired to take a shower after I went in the hot tub last night. If it were a reaction to the chemicals, why are both sides of the rash identical to one another, and only on the sides of my body?