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The most powerful in the world of pain - cluster headache
Cluster headache, it "suicide headache" is so strong that many scientists believe that this is the most severe pain that a person can experience. The pain is so terrible that sometimes a person wants to commit suicide to get rid of it: there were several cases of suicide during attacks.
Cluster headache suffer more often men than women. It arises series ("clusters") every few weeks or months. Each attack lasts from 15 minutes to 3 hours. Basically pain centered around the eye or behind the eye.
Cluster headache affects about 0, 1% of the population. The causes of this condition has not yet been clarified, there is no treatment.
via factroom.ru