Red flags include recent onset, rapidly increasing frequency and severity of headache; headache causing the patient to wake from sleep; associated dizziness, lack of coordination, tingling or numbness, new neurologic deficit; and new onset of a headache in a patient with a history of cancer or immunodeficiency.

Conditions: Headache, Neurologic Deficit

Diagnostic Tests: Head or Brain Imaging, X-Ray, Computed Tomography, CT Scanning, Magnetic Resonance Imaging (MRI)