Cluster headaches are headaches that are spaced close together. They often occur 1 to 2 times a day for several weeks. This cycle of headaches may suddenly stop altogether but can reappear weeks or even years later.
What is going on in the body?
The cause of cluster headaches is unknown. Experts believe that they begin in the part of the brain that manages daily changes in the function of body organs.
What are the causes and risks of the condition?
The causes and risks of cluster headaches are unknown. Cluster headaches occur most often in men between the ages of 20 and 40. Smoking and alcohol use can trigger a cluster headache. Some cluster headaches may be triggered by nasal congestion.