The currently accepted guidelines for classifying and diagnosing headaches
are undergoing substantial changes that are expected to help physicians better
treat one of the more perplexing conditions commonly seen in clinical practice.
Still, the changes are only a first step. Headache specialty societies
know they need to publicize the guidelines so they are used by primary care
physicians and headache specialists.
Mike Mitka. Experts Sort Out Headache Classification, New Guidelines for Physicians to Debut. JAMA. 2003;290(6):736–739. doi:10.1001/jama.290.6.736