1.1.1
Evaluate people who present with headache and any of the following features, and consider the need for further investigations and/or referral:
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worsening headache with fever
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sudden‑onset headache reaching maximum intensity within 5 minutes
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new‑onset neurological deficit
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new‑onset cognitive dysfunction
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change in personality
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impaired level of consciousness
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recent (typically within the past 3 months) head trauma
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headache triggered by cough, valsalva (trying to breathe out with nose and mouth blocked) or sneeze
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headache triggered by exercise
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orthostatic headache (headache that changes with posture)
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symptoms suggestive of giant cell arteritis
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symptoms and signs of acute narrow angle glaucoma
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a substantial change in the characteristics of their headache. [2012]
For information on referral for suspected tumours of the brain or central nervous system, see the NICE guideline on suspected cancer.