Cluster Headache

A cluster headache is one of the most painful types of headache. A striking feature of cluster headache is that the attacks occur in cyclical patterns, or clusters — which gives the condition its name.

Bouts of frequent attacks — known as cluster periods — may last from weeks to months, usually followed by remission periods when the headache attacks stop completely. The pattern varies from one person to another, but most people have one or two cluster periods a year. During remission, no headaches occur for months, and sometimes even years.

Fortunately, cluster headache is rare and not life-threatening. Treatments can help make the attacks shorter and less severe. In addition, preventive medications can help reduce the number of headaches.