While in Florida on vacation i developed a very bad rash starting at my tail bone and working its way up my back.  It was painful and VERY itchy.  It was hot and I was sweating quite a bit every day.  I was wearing clean clothes daily.  I remember itching back there and the next day I was broke out horribly.  When I came home I began cleaning teh area with 90% rubbing alcohol and applying lambasil anti-fungal to the effected area twice a day.  It has mostly gone away, but its been two weeks and the crack itself is still red and has some rash.  I switched out tonight for hydrogen peroxide after the alcohol.  It burned quite a bit and cause white raised bumps to form all over the red areas.  Am I doing the right thing?  Im without health insurance so a dermatologist isnt available to me.  The itching is driving me mad worse than any pain I feel.
Welcome to Chat Doctor. It seems to be photo sensitivity (sun burn) reaction on the back and gradually increasing due to perspiration and later on development of fungal infection inside. Take levocetrizine to subside itching and NSAID to subside pain and inflammation. Apply calamine lotion with skin cream containing steroid and antifungal agent. White raised bumps might be due to HY Chat Doctor. Avoid to exposure in sunlight. Wear cotton inner wear to soak the perspiration. Get examined by dermatologist for proper guidance and medical management.