Tension headache

Tension headache or tension-type headache is the most common type of primary headache. Tension-type headache pain is often described as a constant pressure, as if the head were being squeezed in a vise. The pain can radiate from the lower back of the head, neck, eyes, or other muscle groups in the body typically affects the head bilaterally. They usually occur for a duration longer than 30 minutes, typically four to six hours.