Children’s private place exhaust may be weak, vulvar inflammation, etc., should be timely consultation to identify the cause of the disease. 1. Physiological factors: this situation will lead to the child’s vagina often have gas discharge, feel like farting, they can not control, serious time will feel rustling sound, continuous, the child’s physiological factors lead to the vagina is not tight, so that the air is easy to enter the uterine cavity. 2. Vulvar inflammation: this time the child will also appear the phenomenon of vaginal exhaust, and at the same time will be accompanied by increased leukorrhea, vulvar itching, vulvar discomfort. This is due to the fact that the microorganisms infecting the vagina produce gas in the process of reproduction, which is present in the vagina and is discharged from the vagina when the position is changed or the abdominal pressure is increased. Since this symptom alone cannot determine the disease, it does not rule out other factors. It is recommended that the patient consult a doctor to determine the cause of the disease and provide targeted treatment.