Types of Cluster Headaches
There are 2 types of cluster headaches:
- Episodic cluster headaches are the most common type of cluster headaches. People with episodic cluster headaches have cluster periods of 1 to 3 months when they are prone to having headaches. The cluster periods are followed by headache-free periods (remissions) of 6 months or more. About 90 out of 100 people who have cluster headaches have episodic cluster headaches.1
- Chronic cluster headaches are those that occur during a period of at least 12 months without a headache-free period (remission) or when remissions last less than one month.2 About 10 out of 100 people who have cluster headaches have chronic cluster headaches.1
Evans RW (2009). Headache. In EG Nabel, ed., ACP Medicine, section 11, chap. 8. Hamilton, ON: BC Decker.
Headache Classification Subcommittee of the International Headache Society (2004). International classification of headache disorders: 2nd ed. Cephalalgia, 24(Suppl 1): 9–160.
|Primary Medical Reviewer||Anne C. Poinier, MD - Internal Medicine|
|Specialist Medical Reviewer||Colin Chalk, MD, CM, FRCPC - Neurology|
|Last Revised||January 27, 2012|