My mother has had red flushing on her face over the past five days. She went to a dermatologist and he put her on prednisone . She had tried a new face cleaner and he felt the flushing was a reaction to the new cleanser. Today she noticed a perfectly, much redder, round circle on the back of her leg on her thigh. It does not itch or hurt. It is about the size of a silver dollar. What might be the reason for these symptoms? The flushing on her face is not getting any better either. Please respond and thank you.