The diagnosis of trigeminal neuralgia can be confirmed by symptoms, signs, and ancillary tests. Trigeminal neuralgia is a brief recurrent severe pain in the distribution area of the trigeminal nerve. 1. Symptoms: Trigeminal neuralgia is often limited to the distribution area of 2 or 3 branches of the trigeminal nerve, with the maxillary and mandibular branches being more common. During the attack, there is obvious electric shock-like, needle-like, knife-like pain in the upper and lower jaws of the cheeks and the tongue, lasting for a few seconds or 1~2 minutes, and stopping suddenly. The corners of the mouth, nose and other parts of the sensitive areas, can be triggered by touching, known as trigger points or trigger points. 2. Signs and symptoms: Neurological examination of trigeminal neuralgia usually has no positive signs, and the patient’s corners of the mouth, nose, cheeks and other areas can be painful when touched. 3. Auxiliary examination: In neuroelectrophysiologic examination, the surface electrical activity of orbicularis oculi and masticatory muscles can be observed through electrical stimulation of trigeminal nerve branches, which is used to exclude secondary trigeminal neuralgia. Cranial MRI examination can exclude trigeminal neuralgia caused by organic lesions in the cranial brain. When trigeminal neuralgia occurs, it is recommended to consult a doctor in time and standardize the treatment under the guidance of a professional doctor.