If the old fart after the coitus is mainly considered with the gastrointestinal tract peristalsis accelerated, the phenomenon of blowing. 1. gastrointestinal tract peristalsis accelerated: the stomach is easy to get cold when having sex, resulting in abdominal distension, and when having sex strenuous exercise can cause gastrointestinal tract dysfunction, these factors can induce farting symptoms. The contraction of the uterus will also stimulate the gastrointestinal tract to increase peristalsis, and the gas in the intestines will be discharged along the intestinal tract, so the phenomenon of farting after intercourse can occur. 2. Vaginal blowing phenomenon or vaginal inflammation: for female patients suffering from vaginal laxity or vaginal inflammation, there will be vaginal blowing phenomenon after coitus, which can also emit farting-like sounds. Patients need to clarify the cause and follow the doctor’s instructions for pelvic floor muscle rehabilitation training, anti-inflammatory and other treatments. There are many reasons for farting after coitus, patients are advised to observe their own situation and go to regular hospitals for examination as soon as possible if they feel uncomfortable.