question: Hi, my boyfriend is a painter and 3 days ago acquired large red pimple like bumps on his upper legs and buttocks . After the first day he took Benadryl and used hydrocortisone cream it seemed to make them go down a bit, since them only used the cream and they got worse now they are turning into whiteheads. They are itchy and painful. He has no history of rashes . Could it be something work related or an allergy?