By carefully analyzing the medical history and observing the pain episodes, the site of the facial pain episodes is determined. To identify the point from which the pain attack starts and the area to which the pain spreads as it increases. The nature, characteristics and pattern of the pain, and the factors triggering the onset and aggravation or reduction of the pain are identified. The typical clinical manifestations of trigeminal neuralgia are well recognized, namely: (1) transient, severe, lightning-like recurrent pain in the trigeminal nerve distribution area. (ii) Most of the trigger points are present. ③Roughness, skin discoloration, or hypoesthesia in the corresponding area. ④Trigeminal neuralgia caused by tumors and other occupational lesions often has obvious positive signs of the nervous system. Based on the above clinical manifestations, the diagnosis can often be determined by combining the features of medical history. However, its manifestations are both characteristic and complex, and if not firmly grasped, it is often confused with other painful head and facial diseases, resulting in missed diagnosis and misdiagnosis. Therefore, in addition to a comprehensive neurological examination, otolaryngological, stomatological and ophthalmological examinations, as well as facial and cranial X-rays, CT scans, magnetic resonance imaging (MRI), DSA and other ancillary examinations are also required. Only in this way can misdiagnosis and omission be avoided, and the diagnosis and differential diagnosis of trigeminal neuralgia can be made accurately. By carefully analyzing the medical history and carefully observing the painful attacks, the site of the facial pain attack can be determined. Find out from which point the pain attack starts and to which area the pain spreads as it intensifies. Identify the nature, characteristics, pattern of pain, and factors that trigger the onset and aggravation or reduction of pain.