The examination of trigeminal neuralgia should be selective. 1.Laboratory examination of trigeminal neuralgia 1.Blood routine blood electrolytes, generally no specific changes when the onset of blood may be slightly high. 2.Cerebrospinal fluid examination of blood glucose and immune program, if abnormal, it has differential diagnostic significance. Imaging examination of trigeminal neuralgia Angiography CT and MRI examination: some patients can find the skull base malformation blood vessels The following examination items have differential diagnostic significance if abnormal. 1.Electroencephalography fundus examination 2.Cranial base radiography 3.Chest X-ray electrocardiogram