Sacral 1 vertebral body occlusion is a congenital malformation, often due to the development of sacral 1 vertebral body is not completely closed and lead to occluded cleft, it can be in young people or adolescents, it can have the following symptoms: First, lumbar pain, especially after sedentary back pain is very obvious, often obvious lumbar percussion pain, but not accompanied by lower limb numbness and hip numbness, pain symptoms. Second, percussion pain, there can be obvious pain when percussion in the hidden fissure. Thirdly, activity restriction, due to the pain, the back is obviously restricted, and adolescents often dare not engage in strenuous sports. After sacral 1 vertebral body occlusion usually does not need special treatment, and the pain can be gradually reduced after puberty.