If there is a bubbling sensation down there, clinically it is mainly because the front and back walls of the vagina do not fit together, so air enters the vagina and is expelled from the vagina through movement. The main reason for pubic blowing is that the pelvic floor muscle tone decreases during childbirth, which leads to vaginal laxity and allows air to enter the vagina. Due to ageing, such as in older women, the front and back walls of the vagina do not fit together, allowing air to enter and clinically causing a blowout. It is recommended that women insist on doing anal lifting exercises after vaginal delivery, which can clinically prevent pubic blowout, prevent bulging of the anterior and posterior vaginal walls, and can prevent uterine prolapse.