The cause is not known. The headaches are typically sudden and severe, and may be accompanied by watery eyes or a runny nose. You may feel sweaty, restless, or nauseated. The headaches often start at night and may wake you up. There is no cure for cluster headaches, but there are ways to help relieve the pain.
Prescription medications are available.
Some must be taken in a shot, breathed in by mouth, or put in the rectum to get them into the bloodstream quickly. If your doctor has prescribed any medicine, take it exactly as directed. Ask your doctor whether it is safe to drive or operate heavy machinery while you are taking this medication. Napping in the daytime. Breathing in solvents, gasoline, or oil-based paints for long periods of time.