Tension headache or tension-type headache is the most common type of primary headache. Tension-type headache pain is often described as 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 and typically affects the head bilaterally. They usually occur for a duration longer than 30 minutes, typically four to six hours.
The exact cause of tension headaches is well understood, but factors that can trigger or exacerbate tension headaches include stress, anxiety, poor posture, fatigue, and eye strain. Treatment options for tension headaches may include pain relievers, such as ibuprofen or acetaminophen, and stress management techniques, such as relaxation exercises, biofeedback, or cognitive-behavioral therapy.