Most of the gas discharge in the short-term postpartum period is a normal physiological phenomenon. If the gas discharge still occurs in 42 days or even longer, it is considered to be caused by poor recovery of the pelvic floor muscles or bacterial infection. 1. Short-term postpartum gas discharge is a normal physiological phenomenon: women in the process of childbirth, the fetus is discharged vaginally, the uterus gradually shrinks from a larger size to a non-pregnant state, the uterine cavity of the uterine peritoneum shedding contains blood, necrotic peritoneum and other tissues discharged through the vagina, there may be a situation of vaginal gas discharge. 2. Poor recovery of the pelvic floor muscles: 42 days or even longer due to post-partum rehabilitation exercise is not in place, poor recovery of the pelvic floor muscles leading to vaginal gas discharge. 3. Bacterial infections: Infections of the reproductive system, these bacteria produce metabolic wastes that increase the gas content in the reproductive cavity, which can also lead to postpartum vaginal gas discharge. To summarize, in general, postpartum vaginal gas discharge without obvious discomfort, in the short term is a normal physiological phenomenon, if a long period of time, that is, 42 days after the recovery is not considered poor recovery of the pelvic floor muscles or bacterial infections, you need to actively go to the hospital for diagnosis and treatment.