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Table 6 Warning features on examination, when associated with headache

From: Aids to management of headache disorders in primary care (2nd edition)

Warning feature What to beware of
Otherwise unexplained pyrexia Meningitis
Neck stiffness Meningitis or subarachnoid haemorrhage
Focal neurological signs Secondary headache
Disorders of consciousness or memory
Change in personality
Weight-loss or poor general condition