Since Friday morning, I have had a circular rash on my left arm. It is about 2 inches wide. On Thursday, I was testing different perfumes/ body sprays and the rash is probably in the area where I sprayed one of the perfumes. It doesn't itch, hurt, and is not oozing anything. But it seems to be more red in the morning, and as the day goes on, it seems to almost fade away. I know I have had allergic reactions to deodorants and shaving cream before. Could this just be an allergic reaction or should I be concerned and go to the doctor?