Wheat allergy is usually caused by an allergic response to the proteins found in wheat, which may include but are not limited to gluten. The body produces antibodies to these proteins and primes your body for an allergic reaction when ingesting wheat.
Symptoms can include anaphylaxis, hives, itchy skin, inflammation, vomiting or diarrhoea. Some people have exercise induced responses, so must avoid wheat and exercise in close proximity to avoid anaphylaxis. Diagnosis is generally reached through skin prick tests, blood tests, food diaries and elimination diets.
Those with a wheat allergy should avoid all wheat and perhaps other gluten containing foods.