Normal stool but left abdominal pain and flatulence may be due to intestinal flora imbalance, indigestion, chronic gastritis and other diseases, commonly used drugs include compound digestive enzymes, domperidone, bifidobacteria and so on. 1. Indigestion: patients can take compound digestive enzymes, such as mitomycin pancreatic enzyme tablets and other drugs to promote digestion, to avoid the accumulation of food in the gastrointestinal tract, which produces excessive gas. 2. Chronic gastritis: patients can take acid-suppressing drugs such as omeprazole and ranitidine to inhibit the secretion of gastric acid, and also take gastric mucosal protection drugs such as bismuth potassium citrate and magnesium aluminum carbonate to reduce the stimulation of the gastric mucosa and improve the digestive and absorptive functions of the stomach. If the patient is accompanied by Helicobacter pylori infection, you can also take amoxicillin, clarithromycin, metronidazole and other antibiotic drugs for eradication treatment. 3. Gastrointestinal dysfunction: patients are usually accompanied by gastric insufficiency, and they can take pro-dynamic drugs such as domperidone and mosapride, or drugs to regulate intestinal motility such as pivacurium bromide and trimethoprim. 4. Dysbiosis of intestinal flora: patients can take intestinal probiotic preparations such as Bifidobacterium bifidum and Lactobacillus lactis to improve intestinal microecology and relieve symptoms. If patients have long-term or repeated presence of normal stools but left abdominal pain and flatulence, it is recommended to consult a doctor in a timely manner to identify the cause of the disease and actively receive treatment. The medication should be taken in strict accordance with the doctor’s instructions, and should not be used on its own, so as not to delay or even aggravate the condition.