Headache is pain anywhere in the head that can occur on one or both sides, in isolated locations, radiating across the head, or with a vise-like quality. Common causes of headaches include certain foods containing nitrates, changes in sleep patterns, poor posture, skipped meals, stress, and overuse of pain medication.

1. Headache
Headache is pain in any region of the head. Headaches may occur on one or both sides of the head, be isolated
to a certain location, radiate across the head from one point, or have a vise-like quality.
Causes of Headache
Certain foods, such as processed meats that contain nitrates
Changes in sleep or lack of sleep
Poor posture
Skipped meals
Stress
Overuse of pain medication