There are four types of headache:  vascular, muscle contraction (tension), traction, and inflammatory. All four can hinder getting the sleep you need to heal. The most common type of vascular headache is migraine. Migraine headaches are usually characterized by severe pain on one or both sides of the head, an upset stomach, and, at times, disturbed vision. Women are more likely than men to have migraine headaches. After migraine, the most common type of vascular headache is the toxic headache produced by fever.