This Rash Has Been On Me For About 5 Or

this rash has been on me for about 5 or 6 weeks and it is just in one area, left side of stomach area. It started out with 3 spots about the shape of a triangle, or in triangular formation. its just in this one area of my body. there is a little bit on my arm where it lays on the area at night I guess and has contact for long periods of time. What does this sound like to you?