2. Headache Symptoms - US News and World Report
Headaches that occur suddenly (acute-onset) are usually due to an illness, infection, cold, or fever.

3. Migraine  (Trust Mark: Doctor-Reviewed)
A migraine is a common type of headache that may occur with symptoms such as nausea, vomiting, or sensitivity to light. In many people, a throbbing pain is felt only on one side of the head. Some people who get migraines have warning symptoms, cal...• Reviewer: Daniel B. Hoch, PhD, MD, Assistant Professor of Neurology, Harvard Medical School, Department of Neurology, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.