Fatty liver is a clinical phenomenon in which there is an excess of fat in the cells of the liver. Just like excessive subcutaneous fat, people become fat, and the accumulation of fat in the liver makes the liver become “fat”. In recent years, the number of patients with fatty liver has been increasing, and it has become the second largest liver disease after viral hepatitis, seriously threatening people’s health. Long-term fat accumulation may cause liver fiber proliferation and hardening, which may lead to cirrhosis. However, generally speaking, patients with fatty liver can recover their health if they are detected early and treated early. There are many causes of fatty liver: for example, long-term alcohol consumption, overeating, high blood fat, diabetes, pregnancy, obesity, etc. are all prone to fatty liver. Obesity is the main cause of fatty liver, but thin people can also suffer from fatty liver, long-term vegetarianism, dieting, hunger can lead to malnutrition, some intestinal diseases can lead to intestinal malabsorption, all of these can cause a decrease in protein synthesis in the body, so that the body will use fat, so that fat into protein, fat mobilization makes fatty acids accumulate in the liver to form fatty liver.