1. Tension headache : Causes, incidence, and risk factors  (Trust Mark: Doctor-Reviewed)
Tension headaches are one of the most common forms of headaches. They may occur at any age, but are most common in adults and adolescents. If a headache occurs two or more times a week for several months or longer, the condition is considered chro...• 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.

2. Tension Headache  (Trust Mark: Doctor-Reviewed)
This most common type of headache is caused by severe muscle contractions triggered by stress or exertion. It affects as many as 90% of adult Americans.• Author: Carol A. Turkington