Abstract

About one out of 25 adults suffers headache almost everyday, which is called chronic daily headache (CDH). The term ‘CDH’ represents a combination of various kinds of headache disorders, including primary chronic migraine or transformed migraine, chronic tension-type headache, new daily persistent headache, hemicrania continua, and so on. The patients are usually refractory to standard treatments and have a strong tendency to overuse or abuse medications. To provide an updated insight on CDH, the author has reviewed the pathomechanisms, clinical diagnosis and general and specific principles of management of the individual types of CDH.