Man's most common ailment, its causes- when known, and its therapies- when successful, described at a lay level for presumably the interested victim. Headaches, which are usually a symptom or a functional disturbance, have a wide range of variation in their frequency, their severity, their source. Here they are examined in relation to the eye and eyestrain, glaucoma; to facial neuralgia; allergies; sinus; tumors and other brain disturbances; high blood pressure and constipation; and such specifics as migraines, hangovers, sunstroke, etc. etc. get their due. No home nostrums are indicated- this is just a general introduction to what your doctor may tell you. The market however would seem a little spotty.