A tension-type headache (TTH) is generally a mild ...

A tension-type headache (TTH) is generally a mild to moderate pain that's often described as feeling like a tight band around the head. A tension-type headache is the most common type of headache, yet its causes aren't well understood.
Symptoms
Signs and symptoms of a tension-type headache include:
• Dull, aching head pain
• Sensation of tightness or pressure across the forehead or on the sides and back of the head
• Tenderness in the scalp, neck and shoulder muscles
Tension-type headaches are divided into two main categories — episodic and chronic.
Episodic tension-type headaches
Episodic tension-type headaches can last from 30 minutes to a week. Frequent episodic tension-type headaches occur less than 15 days a month for at least three months. Frequent episodic tension-type headaches may become chronic.
Chronic tension-type headaches
This type of tension-type headache lasts hours and may be continuous. If your headaches occur 15 or more days a month for at least three months, they're considered chronic.