If anyone was ever in any doubt regarding the severity of migraine, they need only be pointed to a report produced by the World Health Organization (WHO). The report indicates that chronic daily headache (CDH), of which migraine is one type, is as disabling to sufferers as psychosis, quadriplegia, or dementia. Many sufferers find their migraines are controllable through conventional pain medications, but for a significant minority such treatments have little to no effect.