Trigeminal neuralgia is comparable to the first pain of the disease, toothache is far less than the pain of this disease, think about it and know how terrible it is, then what causes trigeminal neuralgia so painful, and what causes the occurrence of this disease. 1, dietary inattention can also cause trigeminal neuralgia. Stimulating and too cold or too hot food can cause trigeminal neuralgia attacks. In addition, the nicotine in cigarettes can also cause vasoconstriction, and drinking strong tea can enhance neuroexcitability and trigger small artery spasms. Cured fish, cheese and pickles contain more tyrosine, and the nitrite in ham will cause cerebral vasodilation and stimulate the nerves to cause pain. 2. Compression of intracranial tumor. The cause of trigeminal neuralgia, intracranial tumor compression will lead to the occurrence of trigeminal neuralgia disease, because this cause leads to trigeminal neuralgia disease, often young and middle-aged trigeminal neuralgia patients more, and often secondary trigeminal neuralgia patients. 3, viral infection, trigeminal neuralgia its cause, such as herpes zoster easily involved in the first branch of the trigeminal nerve causing pain. 4, brainstem trigeminal nerve bundle nucleus and abnormal excitatory discharge of the sensory nucleus can also cause trigeminal neuralgia disease. 5. Demyelination. When the sensory roots of trigeminal nerve or semilunar nodes or peripheral branches of trigeminal nerve are compressed or damaged, demyelination occurs; such as anatomical abnormalities, inflammation of bone foramina, vascular malformation, arteriosclerosis, etc. may be the cause of trigeminal neuralgia. 6.Short circuit. Short circuit is one of the causes of trigeminal neuralgia, because short circuit is a “short circuit” between two adjacent fibers caused by the disintegration of the nerve myelin sheath, and a slight tactile stimulus will be transmitted to the center through the “short circuit”, and the central efferent impulse will be transmitted through the “short circuit” again. The central efferent impulse will also become efferent impulse through the “short circuit”, which will reach the threshold of nociceptive neuron and cause pain, leading to trigeminal neuralgia disease. 7. Cerebrovascular miniature disorder. Some causes of trigeminal neuralgia are due to malformation of cerebral blood vessels and brain tissue.