Diabetic lactic acidosis is a clinical syndrome caused by abnormal biochemical changes of persistently high blood lactate and reduced PH (<7.35) from different causes, with serious consequences and high mortality. Mr. Chen, 62 years old, was diagnosed with diabetes during a physical examination 6 years ago. He has always felt that diabetes had no effect on his life other than the extra "medication". However, recently, he experienced discomfort in his abdomen, diarrhea, nausea and vomiting from time to time, and a lack of energy. Then he went to the hospital for a checkup, and the diagnosis showed that he was diabetic lactic acidosis. Mr. Chen was puzzled, what is lactic acidosis? Clinically, diabetic lactic acidosis mainly occurs in elderly patients who take benzodiazepines (hypoglycemic) for a long time or in excess and have heart, liver and kidney diseases. In the early stages of the disease, symptoms of these pre-existing diseases often mask the symptoms of lactic acidosis, making it difficult to identify. The disease generally has a rapid onset and manifests mainly as clinical features of metabolic acidosis of varying degrees, which can have serious effects on the central nervous, respiratory, digestive and circulatory systems when blood lactate is significantly elevated. The only manifestations of mild diabetic lactic acidosis are weakness, nausea, decreased appetite, dizziness, drowsiness and slightly deeper and faster breathing. Moderate to severe cases may include abdominal pain, nausea, vomiting, headache, dizziness, increased fatigue, cyanosis of the lips and mouth, deep, loud to tidal breathing without ketone odor, decreased blood pressure, dehydration manifestations, impaired consciousness, weakened limb reflexes, decreased muscle tone, decreased body temperature and dilated pupils, which may eventually lead to coma and shock. To prevent lactic acidosis, diabetic patients should do the following in their daily life: 1. Do not take phenibut during diabetes treatment. Other biguanides should also not be used in patients with diabetic nephropathy, hepatic and renal insufficiency, and in elderly people older than 70 years old and in patients with poor cardiopulmonary function; 2. Actively treat various diseases that can induce lactic acidosis; 3. Diabetic patients should actively abstain from alcohol and try not to take drugs that can cause lactic acidosis.