The spinal cord is located in the spinal canal, and as people grow and develop, the spinal canal grows faster than the spinal cord, so the lower end of the spinal cord rises gradually in relation to the lower end of the spinal canal. Spinal cord tethering is a condition in which the lower end of the spinal cord cannot rise normally due to various reasons, making its position lower than normal. It is one of the main pathological mechanisms of various congenital developmental abnormalities leading to neurological symptoms, resulting in a series of clinical manifestations known as spinal cord embolism syndrome. Clinical manifestations: skin abnormalities of the low back: skin depression, presence of hair tufts, etc. Motor dysfunction: weakness of the lower limbs, difficulty walking, etc. Sensory impairment: numbness of skin sensation or hypoesthesia urination and defecation dysfunction.