Sinais de alerta na cefaleia

Red flag features:
 new onset or change in headache in patients who are aged over 50
 thunderclap: rapid time to peak headache intensity (seconds to 5 mins)
 focal neurological symptoms (eg limb weakness, aura <5 min or >1hr)
 non-focal neurological symptoms (eg cognitive disturbance)
 change in headache frequency, characteristics or associated symptoms
 abnormal neurological examination
 headache that changes with posture
 headache wakening the patient up (NB migraine is the most frequent cause of morning headache)
 headache precipitated by physical exertion or valsalva manoeuvre (eg coughing, laughing, straining)
 patients with risk factors for cerebral venous sinus thrombosis
 jaw claudication or visual disturbance
 neck stiffness
 fever
 new onset headache in a patient with a history of human immunodeficiency virus (HIV)
 infection
 new onset headache in a patient with a history of cancer

Referêcia: Diagnosis and management of headache in adults.A national clinical guideline.Scottish Intercollegiate Guidelines Network.November 2008