Chronic headaches and migraines afflict many Americans. The severity of pain can go from mild and intermittent to episodes of debilitating throbbing, unrelenting agony, as well as nausea. Relief comes from a variety of means, including over-the-counter medications and prescription drugs, rest, and ice/heat packs on the forehead or neck. Sources of headaches include, but are not limited to, certain kinds of foods, sounds and excessive noise or bright lights, changes in blood sugar, and even too much exercise.