1, secondary trigeminal neuralgia: multiple sclerosis, medullary cavitation, skull base tumor, etc.; 2, toothache: trigeminal neuralgia is often misdiagnosed as toothache, and often the healthy teeth are extracted, and even the extraction of all teeth is still ineffective, so it should be noted. The pain caused by dental disease is persistent dull pain, confined to the gum area, and can be aggravated by eating hot and cold food; 3, paranasal sinusitis: such as frontal sinusitis maxillary sinusitis, etc., is limited persistent pain, there can be fever, nasal congestion, pus and local pressure pain, etc. 4, glaucoma: acute attack of unilateral glaucoma is easily confused with trigeminal nerve branch 1 pain, glaucoma is persistent pain, does not radiate, may have vomiting, accompanied by ball conjunctiva congestion anterior chamber shallowing and increased intraocular pressure, etc. 5.Temporal M arthritis: the pain is limited to the temporal M joint area, persistent, with pressure pain at the joint site and joint movement disorder, and the pain is closely related to the jaw movement, and X-ray and specialist examination are feasible to assist the diagnosis. 6.Migraine: The pain area is beyond the range of trigeminal nerve, and there are mostly visual aura before the attack, such as blurred vision, black spots, etc., which may be accompanied by vomiting. The pain is persistent and long, often half a day to 1-2 days. 7, trigeminal neuritis: short history, pain is persistent, trigeminal nerve distribution area sensory hypersensitivity or hypoesthesia, may be accompanied by motor impairment, there is obvious pressure pain in the affected trigeminal nerve branches. Neuritis mostly develops after a cold or paranasal sinusitis. 8. Glossopharyngeal neuralgia: easily confused with trigeminal nerve branch 3 pain. It is commonly seen in young women and is limited to the tonsils, tongue root, pharynx and deep part of the ear canal, i.e. paroxysmal pain in the distribution area of the linguopharyngeal nerve, similar in nature to trigeminal neuralgia. 9.Pterygopalatine neuralgia: During the attack, the nasal mucosa is congested, obstructed, and lacrimation, characterized by pain limited to the lower half of the face. The pain starts from the teeth, is paroxysmal, lasts for a few minutes to a few hours, and can be recurrent or persistent. 10.Facial neuralgia: Mostly seen in young people, the pain is beyond the trigeminal nerve and can extend to the back of the ear, the top of the head, the occipital neck, and even the shoulder. The pain can be persistent, up to several hours, not related to the movement, not afraid of touch, can be bilateral pain, and can be heavier at night.