Clinically, trigeminal neuralgia craniotomy is basically free of serious sequelae if it goes well. However, if the surgery does not go well, the following situations can occur: 1. If the separation process requires passing through the rock vein structure because of its deep location, it is more difficult to handle. The rock vein can theoretically be removed or ligated, but the ligation of the rock vein in a few patients causes serious complications, mainly resulting in brain swelling, and the surgery has now basically preserved the rock vein; 2, dizziness reaction: generally 3-5 days after surgery, patients can cause dizziness due to low postoperative cranial pressure, which can be relieved by lying down and resting and appropriate activities; 3, increased intracranial pressure, hearing impairment or facial palsy: the chance of occurrence is usually less than 1%; 4 The surgery leads to incomplete closure of the scalp or bone foramen, which can cause cerebrospinal fluid leakage, and if too much cerebrospinal fluid is lost, it can cause gas cranial or mild pain; 5. Inflammatory reactions: such as triggering fever or scalp infection, which needs to be avoided by strict aseptic operation; 6. In the clinic, there can also be errors in differentiation due to the inexperience of the surgeon, trigeminal neuralgia, mistaken for diseases of the facial or auditory nerve, and such cases are relatively rare.