Diabetes mellitus may cause farting a lot, it may be caused by the side effects of glucose-lowering drugs, diabetes mellitus complications, indigestion and other factors. 1. Side effects of hypoglycemic drugs: diabetic patients take some kind of hypoglycemic drugs by mouth for a long time, such as acarbose tablets, voglibose tablets, etc., to reduce postprandial blood glucose, and this kind of drugs is easy to cause abdominal distension, which leads to increase in farting. 2. Diabetes complications: when diabetes is combined with autonomic disorder, gastrointestinal discomfort may occur, such as excessive gas, bloating, constipation and diarrhea alternately, gastrointestinal cramps, abdominal pain and other digestive symptoms. 3. Indigestion: diabetic patients will produce gastrointestinal neuropathy, leading to gastrointestinal dysfunction, gastrointestinal dyskinesia, causing indigestion and making them fart a lot. If diabetes farts a lot, it is recommended to go to the hospital for examination, according to the specific situation, follow the doctor’s advice, and actively cooperate with the treatment.