Trigeminal neuralgia is a disease that has a distinctive and distinguishing feature, which means that it does not cross the border. The trigeminal nerve is a type of nerve in the brain. The trigeminal nerve is divided into three main branches. It includes the ophthalmic branch, the maxillary branch and the mandibular branch. The first branch is called the ophthalmic branch, which is mainly responsible for the skin above the eye fissure, and the ophthalmic nerve is the smallest of the trigeminal nerve branches, containing only general somatosensory fibers. The second branch is called the maxillary branch and is responsible for the interocular area. The maxillary nerve is also a general somatosensory nerve. The third branch is the mandibular branch. The mandibular nerve is a mixed nerve and the thickest branch of the trigeminal nerve branches. It is in charge below the mouth. A lesion in each branch will lead to clinical symptoms and dysfunction in different areas. And the spread of trigeminal neuralgia usually does not jump around, for example, the third branch does not go to the first branch of pain, that is, it does not jump over the second branch. The fact that trigeminal neuralgia does not cross the border is a distinctive feature, even in bilateral patients with unilateral attacks, and it does not cross over to the opposite side. This particular degree of spread is also common. This one means that trigeminal neuralgia does not cross the border. Trigeminal nerve is generally common in neurology, and the treatment plan varies according to the different branches. For conservative treatment, the main treatment is with pain medication such as carbamazepine. But this can only relieve the symptoms, not cure. For trigeminal neuralgia, it is recommended that patients opt for treatment with microvascular decompression. This is the only surgical treatment method that can solve trigeminal neuralgia at its source. Microvascular decompression surgery for trigeminal neuralgia is a very mature surgical technique that has been in clinical use for more than 60 years, and the surgery is not performed inside the brain, but in the subarachnoid space between the brain tissue and the skull, so the risk of surgery is not high. Especially in recent years, the application of minimally invasive surgical techniques has not only significantly improved the surgical efficacy, but also greatly reduced the surgical risk, and microvascular decompression surgery is now the international preferred option for the radical treatment of trigeminal neuralgia. Of course, not all patients must undergo microvascular decompression surgery, and the general treatment principle is: for patients with relatively mild pain, medication should be applied first, and surgery should be considered only when medication is ineffective; for elderly patients, especially those whose general condition is not suitable for microvascular decompression surgery, it is recommended that balloon compression of the meniscus should be chosen first when medication is ineffective. For patients with severe pain that seriously affects their daily life, microvascular decompression surgery should be preferred to cure trigeminal neuralgia. Therefore, the appropriate treatment plan should be chosen according to the physical condition and severity of pain of different patients. Microvascular decompression is the best treatment for trigeminal neuralgia at present. It is a surgical procedure that addresses the root cause of trigeminal neuralgia by separating the nerve from the blood vessels that are connected to it. The surgical treatment of trigeminal neuralgia, also known as “microvascular decompression”, is the most effective surgical treatment in clinical practice. Most patients experience immediate pain relief after surgery and do not have to worry about long recovery times.