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I have had the same rash for years. It started on the back of my calves. Sometimes on my abdomen. Then last year I got one on my neck and through my hair. About a month later my entire body was covered in these round sores. They start out round and they almost look bruised in the center. Sometimes they grow larger. I went to a dermatologist and he gave me cortizone shots and several different creams. It wasn't until I was put on antibiotics for my Crohn's disease that they went away. I think that when ever you have a rash it is an outward sign of something going wrong in the body. Though the dermatologist didn't think that it was caused by my disease, I know differently. Please contact me if you need more info.