Welcome to the Headache Test We encourage you to complete the entire test as information you receive will reflect your answers to every question in the Headache Test. You will receive answers to each question asked, as well as a probable headache diagnosis.  Please keep in mind that this is a new version of the Headache Test, and although the individual answers have been reviewed and are secure, the probable diagnosis is currently being enhanced on a daily basis. Your feedback is very important and we encourage all comments. Please feel free to communicate with us via e-mail at sfhaclin@aol.com, or call us at the San Francisco Clinical Research Center (415) 673-4600.