[Chronic facial pain due to nerve injury. Deafferentation pain].

Patients presenting chronic facial pain are very common. After profound examination a significant cause for this pain often cannot be found. Some patients are suffering from this pain due to injury of a sensible nerve and then it is called deafferentation pain. This somatic disorder can give different complaints. Pain can develop as a result of formation of neuromas 'cross-talking' of nerves and alterations in the central nerve system. It seems to be difficult to make clinical features to diagnose deafferentation pain and differentiate it from pain disorders where the psychic suffering seems to be very important. The treatment is based mainly on the reduction of the conducting of abnormal pulses by the damaged or changed nerves.