When episodic migraine becomes chronic, and what changes
Chronic migraine means headache on 15 or more days a month. What counts, why migraine becomes more frequent, and which NHS treatments open up once it's diagnosed.
Tried several preventives? What comes next on the NHS
Tried at least three migraine preventives without enough benefit? How anti-CGRP treatments work, who qualifies on the NHS and how the 12-week review decides whether you carry on.
