Cluster headache has two key forms: |
-
Episodic: occurs in periods lasting 7 days to 1 year separated by pain-free periods lasting one month*
-
Chronic: attacks occur for more than one year without remission or with remissions lasting less than one month*
|
†Headaches must have each of: |
-
Severe unilateral orbital, supraorbital, temporal pain lasting 15 minutes to 3 hours
-
Frequency: 1 every second day to 8 per day
-
Associated with 1 of:
|
–lacrimation |
–nasal congestion |
–rhinorrhea |
–forehead/facial sweating |
–miosis |
–ptosis |
–eyelid oedema |
–conjunctival injection |
Or |
–sense of restlessness or agitation during headache* |