Chronic paroxysmal hemicrania (CPH), also known as Sjaasta syndrome, is a cluster-like headache that normally affects females. It normally consists of multiple severe yet short headache attacks. These attacks normally will only affect one side of the cranium, hence the term hemicrania. CPH headaches are treated with non-steroidal anti-inflammatory drugs, in particular indomethacin, which is usually totally effective in eliminating the symptoms.