If you feel a dull, steady pain that feels like a band tightening around your head, you may have a tension headache.
If you feel throbbing that begins on one side and causes nausea or sound/light sensitivity, you may have a migraine. Visual disturbances, such as flickering points of light, may precede a migraine headache.
If you feel a severe pain around one red, watery eye, with nasal congestion on that side of your face, you may have a cluster headache.
If you feel a steady pain in the area...
A device is also an option. Cefaly is the first FDA-approved device for preventing migraines in people over age 18. The portable headband-like device gives electrical impulses on the skin at the forehead. This stimulates a nerve associated with migraine headaches. Cefaly is used once a day for 20 minutes, and when it's on you'll feel a tingling or massaging sensation.