A few years ago I was overexposed to the sun and got sunburned on my arms. However, every summer I get a heat rash on both arms that itches and irritates me. Why do I get a heat rash even when I am not in the sun? It can be a rash one minute and then it will clear up another and soon as my body gets hot the rash comes back. Is there something I can put on it besides lotion that will help my arms stay cool or to make it go away by itself? I would go to see a doctor but don't have insurance and it is not that serious for me to go pay to get it checked out, any advice would be helpful. Thanks!