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The general principles around headache as a cardinal symptom are covered elsewhere (Chap. 21); here we discuss disorders in which headache and associated features occur in the absence of any exogenous cause. The most common are migraine, tension-type headache, and the trigeminal autonomic cephalalgias, notably cluster headache.

The general principles around headache as a cardinal symptom are covered elsewhere (Chap. 21); here we discuss disorders in which headache and associated features occur in the absence of any exogenous cause. The most common are migraine, tension-type headache, and the trigeminal autonomic cephalalgias, notably cluster headache.