Lower abdominal distension and farting every afternoon may be related to functional changes in the gastrointestinal tract such as intestinal flora imbalance, dyspepsia, or organic changes such as gastroenteritis. Functional changes are common such as intestinal flora dysbiosis, indigestion, and intestinal spasms, which may cause patients to experience symptoms such as bloating, abdominal pain, diarrhea, and constipation. Organic gastrointestinal disorders, such as gastroenteritis, ulcerative colitis, and Crohn’s disease, may cause patients to experience bloating. There are many other causes of bloating and farting in the lower abdomen every afternoon, and it is recommended that patients go to regular hospitals in time to improve gastroenteroscopy and abdominal ultrasound, CT and other tests, to clarify the cause of the disease, and then targeted treatment or treatment under the guidance of the doctor, in order to minimize the adverse effects of the disease.