Headache refers to a disease with pain in the head as the major symptom, which is caused by exogenous factors or by internal disorders. Exogenous factors causing headache are chiefly wind, usually accompanied with cold, heat and dampness; internal disorders include emotional stress, improper diet, deuteropathic debility, postpartum, blood loss and excessive sexual intercourse. Its location is the head, with the spleen, liver and kidney involved. Wind, fire, phlegm, blood stagnation and deficiency are the major pathogenic factors and its pathogenesis is obstruction of the meridians and failure of lucid yang to ascend. This disease is attributive to periodic migraine; overstrain headache, cluster headache and chronic paroxysmal migraine in western medicine.