Migraine headaches are severe headaches caused by swelling blood vessels in the brain. The VA evaluates disability ratings for migraines by weighing the severity and frequency of the attacks. The schedule allows for up to a 50% percent disability rating for the severest condition. This rating requires that the migraines be frequent, completely prostrating (causing a need to lie down, stop all activity and/or take medication), and prolonged to the point of causing economic damage by preventing the veteran from fulfilling a full time work schedule. In cases of severe migraines frequent enough to affect the veteran’s ability to work, veterans can seek a total disability rating based upon individual unemployability (TDIU). All ratable levels of migraines must be considered prostrating in order to be compensable.