Wheat allergy is an allergic reaction to foods containing wheat, which, in some cases, can also be triggered by inhaling wheat flour.
Wheat allergy is most common in small children, who often outgrow wheat allergy, but adults can also develop a wheat allergy. Up to 1% of children in the US have a wheat allergy with two-thirds of children likely to have outgrown their wheat allergy by the time they are 12 years old (https://pubmed.ncbi.nlm.nih.gov/19492663/).
Wheat allergy symptoms show up on the skin and in the respiratory tract, often directly after meals. Wheat allergy can also cause indigestion, which may occur some time after eating wheat.
Symptoms of wheat allergy include swelling, itching or irritation of the mouth or throat, hives, itchy rash or swelling of the skin, nasal congestion, headaches, difficulty breathing, cramps, nausea or vomiting, and diarrhea.
In some cases, wheat allergy can cause a life-threatening reaction known as anaphylaxis with severe symptoms including chest pain, swelling or tightness in the throat, severe breathing difficulty, trouble swallowing, and dizziness or fainting.
If you think you or your child has a wheat allergy, you should make a note of reactions and food eaten, and consult with a doctor to arrange for allergy testing.