brain, spinal cord, and nerve disorders
Overview of Headache
Key Points
Most headaches do not have a serious cause, particularly if the headaches began at a young age, if they have not changed over time, and if results of the examination are normal. If headaches occur frequently or if Warning signs are present, people should see a doctor. Most headaches do not require testing. Doctors can usually determine the type or cause of headaches based on the medical history, symptoms, and results of a physical examination. If doctors suspect that the cause is a serious disorder (such as a hemorrhage or an infection), MRI is usually done, often immediately. If doctors suspect meningitis, encephalitis, or a subarachnoid hemorrhage, a spinal tap is done, usually after CT or MRI done to exclude abnormalities that increase pressure within the skull. 