The International Headache Society (IHS) is the world's leading membership organisation for those with a professional commitment to helping people affected by headache. As a charity, the purpose of IHS is to advance headache science, education, and management, and promote headache awareness worldwide.
The American Headache Society
The American Headhache Society is a professional society of health care providers dedicated to the study and treatment of headache and face pain. Founded in 1959.