Vaginal leakage often refers to the phenomenon of vaginal venting during sex and in daily life, similar to the sound of farting, which is clinically known as pussy blowing. This phenomenon is mainly due to the following reasons: 1. During labor, the pre-descendent presses the pelvic floor for a long time, which decreases the muscle tone of the pelvic floor and causes the vaginal wall to relax, so that the front and back walls of the vagina cannot fit together and air can easily enter the vagina. 2. As a result, air enters the vagina and this clinical phenomenon occurs.