Male, 81COPD, but otherwise healthy. Has a severe itching rash around and inside anal area. Looks like 2 or 3 layers of skin have been rubbed off, with purplish color skin appearance, approximately 3 in circular size. Used Ttriple Biotic Cream, Gold Bond Ointment, tried change of detergent, and nothing seems to help. Diagnosis, and cure would be greatly appreciated.