 [ Symptoms ] 82 year old male fully conscious but can not stand up doctors have no diagnosis except autoimmune neuropathy [ Disease ] food allergy symptoms usually appear very soon after the food is eaten    within a few minutes to a couple of hours if you are introducing a new food to your baby keep an eye out for these symptoms hives flushed skin or rash face tongue or lip swelling vomiting andor diarrhea coughing or wheezing difficulty breathing loss of consciousness if your baby is having trouble breathing has swelling on her face or develops severe vomiting or diarrhea after eating do not take time to call your pediatrician call 911 immediately severe allergic reactions can be fatal very quickly