The lumbar spinal sacral canal is divided into congenital and secondary, usually congenital lumbar spinal sacral canal. If there are no special symptoms it does not need to be treated and no special treatment is needed. Unless the sacral canal cyst is larger and has affected the nerves, and then neurological symptoms such as poor urination and defecation or lower limb pain, if other causes of the above symptoms are ruled out, surgical treatment can be considered to remove the cyst and subsequently relieve the pressure, and the symptoms can be relieved. Clinically simple cysts can be treated without treatment. While secondary cysts, i.e. trauma or tumor can also cause cysts, which can be surgically removed. Once a cyst develops the first thing you should do is to visit a hospital and get an MRI. This is because MRI shows cysts more clearly, including the type of cyst. If the cyst is large and symptomatic, and other problems are ruled out, surgery can be performed. In addition, neurological symptoms caused by other diseases or causes that are not caused by cysts can be disregarded and should only be observed, such as having another MRI in a few months to see if there is any change.