My son was stung by a wasp earlier this evening. I treated the sting. About an hour and a half later he started itching all over with a rash all over his body. I put him in a oatmeal bath and gave him Benadryl. It helped with the rash and itching but now his lips are swollen. I also put apple cider vinegar on the sting after the bath. Do you have any other suggestions?