DD's (8) right ear is periodically turning bright red, hot and itchy with visible raised bumps, like hives. It's happened about three times now. She doesn't have an ear ache but the edge/rim (? not sure what you call that ear part?!) goes red and hot and there are bumps visible on it. Just the one ear. What could this be? She doesn't have pierced ears, and has no food allergies. Haven't changed washing powder or anything like that. Will pop to GP but wondered if anyone could shed any light?