Sacral occlusion is a congenital condition in which the bones do not close completely during growth and development. The reason is that in the sacral canal travels the spinal cord, which is the center that controls the sensation and movement of the human body. If the sacrum is hidden, the spinal cord is exposed and vulnerable to injury. After the injury, it can produce pain, abnormal bowel movements and abnormal sensation in the buttocks. In terms of treatment, there is usually no need for treatment if there are no symptoms. If the symptoms described above occur, surgery is required for relief. In addition, a review of the x-ray is usually required in about 6 months to 1 year. If the disease does not progress, you can continue to observe and do not need to worry much.