The lower part of the body becomes loose after childbirth. In the process of childbirth, along with the progress of contractions and labor, the fetus gradually descends, the fetal head enters the vagina from the uterus, along with the further expansion of the vagina, the extreme stretching and expansion of the perineum, and even some vaginal or perineal lacerations occur during childbirth, so this will lead to different degrees of prolapse of the perineum, vagina, bladder and rectum, that is, the front and back walls of the vagina after childbirth. This is also the main cause of pelvic organ prolapse, so we should pay attention to functional training of the pelvic floor after childbirth, and the most common functional training is Kegel exercises or anal reduction exercises, which can relieve most of them to a certain extent. If the birth injury during childbirth is strong, or if there is no timely recovery after childbirth, coupled with constipation or coughing, pelvic floor dysfunction will gradually worsen, and some patients even need surgery.