question: Hi, I recently had a rash on my lower back/upper buttocks that kind of appeared out of nowhere. At first it was real sensitive, like a cut almost, then it scabbed immediately. This is similar to another "rash" I had that scabbed, and it hasn't gone away. It's not bothersome anymore, but just kind of strange that the black scab hasn't gone away. In both instances, there was no itching and major scratching that preceded it. Any ideas what this might be?