<s>[INST] I have a very ichy, stinging, rash on my butt crack. It bleeds a lot if I do scratch it and I have had this problem for going on 4 years, I ve been to doctors several times and nothing works! It s so painful sometimes that I cannot even sit down normally! Please help me it really bothers me at night! [/INST] Hi,Thank you for your query. I can understand your concerns.You seem to have atopic eczema/ atopic dermatitis in crack of your buttock.Eczema is recurring skin rashes ,characterized by redness, skin edema (swelling), itching and dryness, crusting, flaking, blistering, cracking, oozing etc.A corticosteroid ointments, creams or lotions e.g .clobetasol application will help. It will reduce the chronic inflammation. Once the lesion has healed up .keep the skin moisturized to  prevent its recurrences. Regards Dr. T.K. Biswas M.D.Mumbai </s>