Diet Plan for Headache Headache is one of the common medical complaints experienced by most of the people at some point of their life. Headache can be a sign of stress, either physical or mental. Skipping meals and fasting can trigger it. Diet is very important factor for preventing or treating headache. A healthy diet should consist of fruits, vegetables, grains, and lean proteins. Avoid fasting, skipping meals, delayed or irregular meals, high sugar foods, junk foods, fried foods, beverages,