The reasons for the persistence of pain after trigeminal neuralgia surgery need to be specifically analyzed and may be different for each patient. The trigeminal nerve is divided into three branches, each of which governs a different area: the frontal branch is mainly distributed in the forehead area; the second branch is mainly distributed in the maxillary position; and the third branch is distributed in the mandibular position. The pain in each region corresponds to a different surgical approach to trigeminal nerve involvement. Trigeminal nerve radiofrequency and balloon compression surgery can cure the second and third branches of the trigeminal nerve. For the first branch of the trigeminal nerve, radiofrequency thermocoagulation of the trigeminal nerve, if performed, may cause ulceration of the eyelids and corneal ulcers, resulting in loss of vision, so peripheral branch destruction is generally not used. Pain can still exist after trigeminal neuralgia surgery mainly because of the different surgical options. In addition, trigeminal nerve microvascular decompression surgery can cure trigeminal neuralgia not limited to two or three branches, it can do one, two or three branches at the same time. However, even after microvascular decompression surgery of the trigeminal nerve, about 5% of patients still have pain after surgery. This is because after the compression of the trigeminal nerve is released, the nerve degeneration does not recover in time, and it may take some time to heal and repair itself slowly.