In general, the long-term efficacy of microvascular decompression for trigeminal neuralgia is satisfactory, but there is a certain recurrence rate, which means that some patients’ pain will reappear with the prolongation of time. The reasons for recurrence include: with the prolongation of time, the decompressed blood vessel during the surgery is repositioned to form compression on the trigeminal nerve; there are also other vascular sclerosis displacement to compress the trigeminal nerve; there are also some patients whose symptoms recur for reasons that are not clear.