The fat content of the liver is only about 3% to 5% of the weight of the liver when a normal adult consumes a diet with good composition. However, under certain abnormal conditions, the fat content of the liver increases and fat cells fill the hepatocytes in large numbers. When the fat content exceeds 10% of the weight of the liver, or when more than 80% of the liver parenchymal cells are histologically fatty, the liver is said to be fatty. What factors can cause fatty liver? 1, dietary factors: First of all, long-term malnutrition, hunger or long-term consumption of diet containing high fat and high cholesterol (such as fatty meat, egg yolk, cream, chocolate, etc.) is an important reason for the formation of fatty liver. Also want to emphasize the point that many patients, once infected with liver disease or other chronic diseases, in the stationary phase, are given uncontrolled increase in nutrition and high-calorie diet, or long-term continuous intravenous drip high concentration of glucose, resulting in excess nutrition and weight gain, which will eventually lead to fatty liver. 2.Long-term heavy drinking: under the action of alcohol can also make the liver fat metabolism disorder, fat cell accumulation, the occurrence of “chronic alcoholic fatty liver”. 3, obesity: about half of the obese patients can be seen to have mild fatty liver; in patients with severe obesity, the incidence of fatty liver can be as high as 60% to 90%. Obese patients can be seen to have a significant tendency to fatty liver. 4, drugs or chemical toxins: such as steroid hormones, growth hormone, salicylic acid preparations (such as aspirin), certain sedative sleeping drugs, industrial or laboratory commonly used benzene, arsenic, alcohol, iodoform, carbon tetrachloride, antimony, etc. are prone to induce fatty liver. 5, infection: such as tuberculosis, chronic ulcerative colitis, chronic bronchitis, chronic liver, biliary and kidney diseases can often be accompanied by fatty liver. 6, endocrine diseases: diabetes, anterior pituitary and hyperthyroidism, etc., especially in patients with diabetes, the incidence of fatty liver of 20% to 80% (average 50%), and fatty liver patients with diabetes also account for 4% to 46% (average 25%). 7, chronic hypoxia: such as severe anemia, cardiovascular and respiratory diseases and high-altitude, plateau operations, etc., often because of severe hypoxia, affecting the fat metabolism function of the liver, thus fatty liver occurs. 8, other: people who do not like to exercise, long-term sitting work, etc. may also occur fatty liver.