Cluster headaches can be characterized by a sudden-onset severe pain, that is generally behind one eye. This type of headache is the most severe type, but are actually less common than tension headaches and migraines. Cluster headaches tend to occur in groups, and can occur daily or multiple times a day. They can last 1-3 hours and the pain will occur in the same way each time.
Cluster headaches have several different triggers that can be bring them on. Like alcohol or tobacco use, bright light, heat, and foods that contain nitrates, such as lunch meat or bacon. While there is no known cure for cluster headaches, your doctor can recommend ways for you to mitigate the pain.
These options may include lifestyle changes like quitting smoking, oxygen treatment, Verapamil, a medication that relaxes blood vessels; or Prednisone, a steroid medication to reduce inflammation and swelling.