Are the headaches throbbing and severe?
Cluster headaches, which are rare, occur off and on for weeks at a time. During a cluster period, which can last for several months, you may experience one or more cluster headaches a day. These headaches: • Typically begin quickly without warning and reach maximum intensity within minutes • Usually affect just one side of your head • May be accompanied by tearing or redness of the eye or a droopy eyelid on the affected side of the head and a runny or stuffy nose • Typically last from 15 minutes to three hours • May cause a sense of agitation Treatment Because the pain of a cluster headache strikes suddenly and may subside quickly, over-the-counter pain relievers aren’t effective.