Who will have fatty liver: Excessive alcohol consumption: It is generally believed that the average daily consumption of alcohol does not exceed 30g of ethanol (women do not exceed 20g) when the amount of ethanol is within the safe range, ethanol amount of calculation: alcoholic beverages (mL, 1 tael for 50mL) X degrees of alcohol, 100 X 0.8. Obesity: 22.5%-52.8% of obese children as well as 57.5%-74% of obese adults will have a fatty liver. 1, weight more than 20% of the maximum value of the standard weight: the maximum value of the standard weight (kilograms) = height (meters) squared multiplied by 25. 2, waist/hip ratio: male greater than 0.94; female greater than 0.9. 3, the thickness of subcutaneous fat on the abdominal wall > 3cm, abdominal obesity (i.e., “beer belly”.), “General belly”). What are the manifestations of fatty liver: most of the fatty liver without discomfort, generally to the age of 41-60 years of age of adults more pieces, women more than men. The main manifestations are: abdominal discomfort, right upper abdominal pain, fatigue; doctor’s examination can be found: hepatomegaly, splenomegaly, spider nevus. Alcoholic fatty liver caused by heavy drinking may develop into cirrhosis; non-alcohol-induced fatty liver has a low chance of developing cirrhosis; non-alcohol-induced fatty liver in middle-aged women who are obese, diabetic, and hyperlipidemic is more prone to develop into cirrhosis. How to find fatty liver early 1, in the patients with asymptomatic ALT elevation for unknown reasons, 90% of them are fatty liver not caused by alcohol consumption. Ultrasonography: it is the first choice of diagnosis, when the fat content is more than 30%, ultrasonography can find fatty liver; when the fat content reaches more than 50%, more than 90% of patients can find fatty liver by ultrasonography. 3.Liver puncture biopsy: the most sensitive examination method, at the same time, it can determine the future development trend, predict the possibility of liver fibrosis and cirrhosis development, and also identify the focal fatty liver and tumor. What is the harm of fatty liver 28% of fatty liver liver damage continues to develop, 59% have no substantial changes, 13% of liver damage can be improved or eliminated, a few cases develop from steatosis to steatohepatitis, and even progress to cirrhosis, most of the development results are good; long-term excessive alcohol consumption is prone to liver cirrhosis. How to treat Weight loss: the speed of weight loss is quite important, which plays a key role in the improvement and deterioration of liver damage, including diet control and exercise therapy for patients with severe fatty liver, the speed of weight loss should not be too fast: too fast weight loss in the short term (>5kg/month) can promote liver damage and weight rebound; the recommended speed of weight loss: 0.25-0.5kg/week for children, 0.5-1.0kg/week for adults weight loss enables Fatty liver subside and reduce aminotransferase; every 1% of body weight reduction in aminotransferase decreased by 10%, 4-6 months within 10% weight loss can make aminotransferase back to normal. (I) Dietary treatment: fatty liver caused by drinking alcohol: prohibit alcohol, correct malnutrition: high-calorie, high-protein diet, supplement a small amount of vitamins, reduce sweets, and have a moderate amount of fatty foods. Fatty liver associated with obesity: 1, low calorie: 20~25 kcal per kilogram of body weight. 2.Limit fat and sugar, fat should be vegetable oil or food containing long chain unsaturated fatty acids, such as fish. 3.High protein: Ensure a certain amount of high-quality protein every day, such as tofu, bean curd and other soy products, lean meat, fish, skimmed milk, etc. 4, to ensure the supply of fresh vegetables, especially green leafy vegetables, sugary vegetables and fruits should not eat too much. 5, ensure water: drink no less than 1 liter of water per day, and drink 250mL of warm water every day after getting up to urinate. 6, give priority to millet, oat noodles, sesame seeds, rape, spinach, cauliflower, beet, dried scallops, tamari and other foods. 7, avoid spicy and stimulating foods, such as chili, pepper, curry and alcohol: less meat soup, chicken soup, fish soup and other foods. (ii) Exercise therapy: Suitable people: fatty liver caused by obesity, diabetes, hyperlipidemia. Unsuitable people: Malignant malnutrition, protein-based calorie nutritional deficiency (commonly found in people who drink and do not eat). Fatty liver caused by pregnancy, Reye’s syndrome should limit activities. Exercise should be limited in over-nutritional fatty liver disease combined with cardiovascular or cerebrovascular disease, renal disease, or cirrhosis. Obesity caused by disease should not exercise more. If the degree of obesity is more than 70%, the patient should be given medication to lose weight first, and then start the exercise therapy when the weight is reduced to less than 50% of the degree of obesity. How to exercise Types of exercise: jogging, medium and fast running, cycling, up and down stairs, climbing, badminton, dancing, swimming. Exercise intensity: Heart rate at least 100 beats/minute, not more than 180. Exercise duration: At least 30 minutes. Exercise period: afternoon or evening, preferably 1-2 hours after meals. Frequency of exercise: 3-5 days per week. (iii) Medication: not a substitute for abstinence from alcohol Polyunsaturated lecithin: Ezetimibe. S-adenosylmethionine (Semtex): suitable for malignant malnutrition, hepatotoxins, alcoholic fatty liver. Antioxidants: reduced glutathione, carotenoids, vitamins B, C, E, selenium organic compounds, amino steroid derivatives. Amino acids: For malignant malnutrition, protein-based food malnutrition. Silymarin.