In the United States, 1.4 percent of all visits to office-based physicians is due to headache,which represents approximately 12 million physician visits in one year. According to recent studies, 8.7 million females and 2.6 million males in the U.S. experience migraine. Only about one-third of female headache sufferers have ever consulted a physician for their headache problems. The headache attacks greatly impact on the ability of women to work and pursue everyday life activities.
