Fatty liver occurs mainly due to poor dietary structure and alcohol abuse. Therefore, to prevent the occurrence of this disease, a reasonable and balanced dietary structure and a regular diet should be established. Do not drink alcohol and drink light tea regularly. Adhere to appropriate physical exercise. Actively treat the primary disease. Obesity caused by overeating and overweight is one of the most common factors causing fatty liver in recent years, and protein and calorie deficiency is another important cause of fatty liver. Malnutrition is a chronic nutritional deficiency disease, mainly due to long-term lack of energy and protein in the body, according to the different causes, can be divided into two categories: primary and secondary. 1, primary malnutrition: mainly due to insufficient food protein and energy supply or intake, long-term failure to meet the physiological needs of the human body, mostly in developing countries or economically backward areas. 2, secondary malnutrition: mostly induced by other diseases, Europe and the United States and other developed countries, as well as older children and adults in the occurrence of malnutrition secondary to more, commonly in malabsorption syndrome, chronic infectious and inflammatory diseases and malignant tumors and other chronic wasting diseases. Lack of protein in the diet can cause fatty liver even if there are enough calories. Many endocrine metabolic diseases such as cortisolism, hyperthyroidism, hyperuricemia, hyperlipoproteinemia and diabetic hyperlipidemia can cause hepatocyte steatosis, among which non-insulin-dependent diabetes mellitus is most closely related to fatty liver. Therefore, malnutrition can get fatty liver, so you should pay attention to it.