There is gas down there like farting, this situation indicates that the vagina is a little loose, also known as vaginal blowout, mostly seen after multiple deliveries or induced abortions, abortions, it is prone to this phenomenon, without having children is relatively rare. This is because the pelvic floor muscle relaxation, you can see a doctor to do pelvic floor function check, can also do pelvic floor rehabilitation, or under the guidance of the doctor to do PC muscle contraction action, that is, contraction of the anus, can be done twice a day, each time more than 20min, so that a long time will help to restore the tightness of the vagina, and more helpful to the coordination of sexual life. If the effect is not good after active treatment, you can also consider doing vaginal tightening surgery if necessary, which will cost more.