The said fart clinically refers to the blowing up, the reason why the formation of blowing up in the clinic there are mainly the following reasons: 1, after childbirth, especially vaginal delivery caused by the pelvic floor muscle relaxation, so it will lead to vaginal relaxation, would have been the normal situation of the vaginal front and back wall is close together, after the vaginal relaxation can not be close together, it is very easy to make the air into the vagina and discharged out of the vagina, so the symptoms of blowing up. It leads to the appearance of the symptoms of blowing; 2, due to age, the aging of the organs lead to vaginal relaxation, there will also be the symptoms of blowing; 3, relatively thin women pelvic floor fat is relatively small, the vaginal wall is difficult to fit together, there will also be this symptom.