Shallow uterus should be considered to have uterine prolapse, the normal female vagina 8-10cm, if it is a natural birth, the uterus may be a little prolapse, but the distance between the outer mouth of the uterus and the vaginal opening should be more than 4cm, if less than 4cm consider the uterine prolapse. Most patients with uterine prolapse will have bulging of the anterior and posterior walls of the vagina, and the prolapse is divided into I, II and III degrees. If the cervical opening has not reached the hymenal edge, it is called degree I; if the whole cervix protrudes from the cervical opening but the uterine body is still inside the vagina, it is called degree II; if the cervix and the uterine body protrude outside the vaginal opening, it is called degree III. Most of the time, it is caused by women who do not get timely rest after delivery, hold the baby too early or do heavy physical work.