This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
Headache—frequently asked questions. National Headache Foundation website. Available at:
. Accessed November 7, 2012.
NINDS headache information page. National Institute of Neurological Disorders and Stroke
website. Available at:
. Updated September 2012. Accessed November 7, 2012.