A secondary headache is brought about by a separate health disorder. Secondary headaches are usually more serious than primary headaches, and may require urgent medical attention.
Common Causes of Secondary Headaches
* Head or neck trauma * Cranial or cervical vascular disorder * Nonvascular intracranial disorder * Infection * Psychiatric disorder
- Jerry W. Swanson, M.D. "Mayo Clinic on Headache." Mayo Foundation, 2004: p. 13