The main reason for vaginal farting is due to the relaxation of the vaginal walls. Clinically, the reason is that during labor and delivery, as the exposed part of the body presses on the pelvic floor for a long time, the muscle tone of the pelvic floor muscle decreases, causing the vaginal wall to become loose, and air can easily enter. In addition, if a perineal laceration is caused during labor and is not stitched up in time, air can also enter the vagina. In other cases, even if the patient has never given birth to a child or had a history of labor, the muscles or fat in the pelvic floor are not full due to a thin body, which prevents the front and back walls of the vagina from fitting together, causing air to enter and exit the vagina.