Typically the headache is unilateral and pulsating in nature, lasting from 2 to 72 hours.[1] Headache is the second most common reason for a visit to a doctor.There are approximately 45 million Americans complaining of headaches each year. That works out to about one in every six people or 16.54% of the population.[2]Migraine headaches often begin in childhood, adolescence or early adulthood.[3]However, there are effective treatments, and methods that can help to prevent migraines. Most people find ways of managing their migraines so that there is little disruption to their lives. Learn more in treatment for migraine.