This PowerPoint presentation discusses various types of headaches, their causes, symptoms, and treatments. It covers common headaches like tension headaches as well as more complex migraine types such as classic migraine, common migraine, basilar migraine, and cluster headaches. For migraines, it describes genetic and vascular theories of causation as well as the roles of serotonin and nitric oxide. Treatment approaches covered include acute medications for migraine attacks as well as various prophylactic drugs.