A variety of human subhealth symptoms are caused by fatty liver, such as upper abdominal discomfort, anorexia, bloating, nausea, vomiting, indigestion, and diarrhea at the slightest improper diet. Many patients also develop nosebleeds, bleeding gums, intermittent purpura of the skin and varying degrees of anemia. Some patients have long-standing peripheral neuritis, keratitis, hyperkeratosis of the skin, etc., but have been unable to figure out what the cause is. What is more noteworthy is that patients with fatty liver have relatively low immune function and hormone metabolism disorders in the body, which manifest themselves as irregular menstruation or amenorrhea in women and mainly as hypogonadism in men. Fatty liver patients are often accompanied by hyperlipidemia and increased blood viscosity, in which low-density lipoprotein (LDL), because of its very small molecular weight, can easily cross the inner membrane of arteries and settle in the wall of blood vessels, making the arteries less elastic, narrower and less flexible, eventually leading to blood circulation disorders and rupture of blood vessels, endangering lives. Hazard No. 2, induce or aggravate hypertension, coronary heart disease arteriosclerosis and hypertension, coronary heart disease is very close, research shows that alcoholic fatty liver patients combined with hypertension, coronary heart disease, easily lead to sudden death due to myocardial infarction. The third hazard, encephalopathy fatty liver syndrome is mainly diffuse cerebral edema and severe hepatic steatosis with enlarged liver and solid texture. Accompanied by significant cerebral symptoms: convulsions, progressive disorders of consciousness and even coma, the morbidity and mortality rate is as high as 70-80%. Fourth, it leads to cirrhosis and even liver cancer. The final result of various liver diseases is often cirrhosis, and fatty liver is no exception, and the chance of cirrhosis secondary to hepatocellular carcinoma is high. Liver cirrhosis is divided into compensated and decompensated stages. Once cirrhosis develops to the decompensated stage, liver coma, liver ascites, gastrointestinal hemorrhage, liver failure, liver and kidney syndrome are likely to occur, which is not far from the end of life. This disease is also known as obstetric acute yellow liver atrophy, which is a rare and dangerous prognosis of pregnancy complications. The clinical manifestations are often similar to those of acute severe hepatitis, which can lead to acute liver failure, pancreatitis, renal failure, systemic coagulation abnormalities and rapid death, mostly in pregnant women in their first pregnancy. Typical cases present with an acute onset of illness with nausea, vomiting, epigastric pain, back pain, varying degrees of hypertension, edema, progressive worsening of jaundice, coma, ascites, large skin petechiae, blood in stool and blood in urine within a short period of time. Once the diagnosis is clear, the pregnancy should be terminated immediately, which is the only effective way. If we wait until the late stage of liver failure, coagulation dysfunction, and then perform caesarean section or induction of labor, postpartum hemorrhage may occur, endangering the lives of mother and child. Diabetes mellitus is a chronic metabolic disease of unknown etiology, mainly due to insufficient insulin secretion or insulin resistance and the formation of disorders of glucose metabolism, characterized by hyperglycemia, hyperlipidemia and hyperaminoacidemia. According to the survey, about 50% of diabetic patients are combined with fatty liver, and about 30-40% of fatty liver patients are combined with diabetes. The blood glucose level of fatty liver patients is significantly higher than normal, and obese fatty liver patients with blood glucose concentration above the normal level are generally considered to be pre-diabetic, although they have not reached the diagnostic criteria of diabetes. Fatty liver and diabetes mellitus are a pair of difficult brothers and sisters, and having both will make the treatment more difficult and accelerate the development of the disease.