my 3month old son has been vomiting and has bumps appearing on his legs feet stomach we think he might be teething and he maybe be allergic to fleas but where not sure because we just treated the house. we've changed his formula three times now he's drinking lactose free. his bowels are fine.no temperature. slobbering and spitting a lot.

Optional Information:
Male , Age: 3 months

Already Tried:
rubbing anti itch cream and baths