Food allergy and headache. Whom to evaluate and how to treat.

Clinical observations and studies support the role of food in causing migraine and sinus headache. Diagnosis of food allergy is based on a diet log, diet trial, and prospective food challenges as indicated. In most cases, patients with food-provoked headache can obtain relief by avoiding a few selected, commonly eaten foods. Benefits of an avoidance diet include the need for fewer medications.