question: My son is 4 yrs old, and he keeps breaking out with red blister looking wheps on his face, hands and legs. Any ideas? We give him Benadryl and it goes away and may not come back for a couple days. We are remodeling the house, so we thought it was something that he was getting into there, but he broke out at daycare today. Please help. ER sends him home and doctor has no clue....