Tension headaches are one of the most common type of headache. They are diffuse, mild to moderate, and sometimes feel like a band squeezing tight around the head.

The cause of tension headaches are not well known. The current, most common theory suggests that the condition derives from a heightened sensitivity to pain and stress. Tension headaches are distinguished from migraines, though the same people can have both. Unlike migraines, a tension headache is not accompanied by nausea, vomiting, or visual disturbances. However tension headaches can cause an increased sensitivity to light. The condition can be considered episodic, i.e. lasting less than 15 days a month, or chronic, lasting more than 15 days a month. Read more…