I don't think you should apply hydrocortisone anywhere near the face especially not the mouth. The face skin is very sensitive so our doctor told us we shouldn't apply on the face. If the rash appears around the mouth after ingesting food it's likely an allergy, do you remember what your baby ate? Please bring baby to a doctor for proper allergy assessment. If the rash is from allergy, an antihistamine like Zyrtec should help but you should get it from a doctor.
Anonymous