Sacral cysts at the s2 vertebral level are arachnoid cysts within the sacral canal, which are benign lesions that grow slowly and develop obvious symptoms only after a long period of time. Follow-up observation is usually sufficient, and surgery is required to alleviate the symptoms in severe cases. Arachnoid cysts in the sacral canal are watery sacs that form when the epidural connects with the subarachnoid space within the dura mater. Usually there are no symptoms, just a condition found during examination, most of them do not need treatment, just regular follow-up to observe changes in the cyst. Once symptoms are detected, they should be treated by surgery. s2 vertebral level sacral cysts can cause pain and numbness in the sacrococcygeal area and buttocks, distension of the perineum, and other abnormal sensations, and even affect urination and defecation and sexual function. The surgical treatments currently used mainly include laminectomy and decompression surgery in the sacral area, or the use of gelatin sponges to tamponade the traffic holes, or the externalization of the cyst wall and the closing of the traffic holes with sutures. After symptoms of sacral cysts at the s2 vertebral level, it is important to go to the hospital in time to further clarify the cause of the disease and to treat it to stop the progression of the disease.