14 month old boy awoke with raised, swollen skin patches on both arms at back of elbow. The raised skin is almost identical on both elbows, he has a fever of 102.3, and his ears are red. He has a history of eczema and I have been treating cortisone 10 cream when needed. He has not had any vaccines yet. He is healthy & average height and weight and has no known food allergies. Should I wait to see if these swollen skin patches clear up on their own? What may cause a rash in this area?