A child or adult with wheat allergy is likely to develop signs and symptoms within minutes to hours after eating something containing wheat. Wheat allergy signs and symptoms include: 
Swelling, itching or irritation of the mouth or throat
Hives, itchy rash or swelling of the skin
Nasal congestion
Headache
Difficulty breathing
Cramps, nausea or vomiting
Diarrhea
Anaphylaxis
 Anaphylaxis For some people, wheat allergy may cause a life-threatening reaction called anaphylaxis. In addition to other signs and symptoms of wheat allergy, anaphylaxis may cause: 
Swelling or tightness of the throat
Chest pain or tightness
Severe difficulty breathing
Trouble swallowing
Pale, blue skin color
Dizziness or fainting
