Gluten is a protein found in many grains, including barley, rye, and wheat. In people with celiac disease, lasting damage is caused to the lining of the small intestine when gluten is eaten. The symptoms of gluten sensitivity or gluten intolerance include abdominal pain or cramping, feeling gassy and bloated, and diarrhea.
While few people have a true gluten intolerance or gluten allergy, many people still follow a gluten-free diet. If a patient feels they might be allergic to gluten, they should make an appointment with an allergist to be tested for gluten intolerance.