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Table 49-1

Common Causes of Headache

Primary HeadacheSecondary Headache
Type%Type%
Tension-type69Systemic infection63
Migraine16Head injury4
Idiopathic stabbing2Vascular disorders1
Exertional1Subarachnoid hemorrhage<1
Cluster0.1Brain tumor0.1

Source: After J Olesen et al: The Headaches. Philadelphia, Lippincott Williams & Wilkins, 2005.