Cluster headaches
Cluster headaches are uncommon but very severe headaches. The pain always strikes one side of the head typically located in or around one eye and is very severe burning or sharp pain. The affected area may become red and swollen, the eyelid may droop, and the nasal passage on the affected side may become stuffy and runny. The attack starts abruptly and lasts for 30 to 60 minutes. This type of headaches tends to come in clusters, with one to eight headaches a day during a period of weeks, months or a couple of years. In between clusters, there may be no headache symptoms, and this headache-free period can last months to years. Acupuncture again is effective to reduce cluster headaches.
