Under normal circumstances, liver cells contain a small amount of fat, and the total amount will not exceed 5% of the liver. If there is too much fat in the liver, a fatty liver will be formed. The causes of fatty liver are as follows: 1. Obesity. The fat content in the liver is proportional to the fat content in the body, and fatty liver is more likely to occur in obese people. 2.Drinking. People who drink a lot for a long time are prone to alcoholic fatty liver. 3, malnutrition. When malnutrition, the liver can not synthesize apolipoproteins, resulting in the accumulation of fat in the liver, thus forming a fatty liver. 4.Some drugs such as tetracycline, adrenocorticotropic hormone, puromycin, etc. can form fatty liver by interfering with the metabolism of lipoproteins. Mild to moderate fatty liver usually has no obvious clinical manifestations, while severe fatty liver can show symptoms such as poor appetite, weakness, nausea and vomiting. Blood sampling may reveal increased glutamic aminotransferase, glutamic oxalacetic aminotransferase, alkaline phosphatase, etc. Ultrasound examination of liver and CT examination of liver can help to detect and diagnose. Mild fatty liver usually does not affect health, but if moderate to severe fatty liver exists for a long time and is not treated, it may cause cirrhosis and seriously affect health. The main treatment methods for fatty liver are: scientific weight reduction and alcohol cessation. For fatty liver caused by malnutrition, nutrition should be supplemented and the recipes should be reasonable. For fatty liver caused by drugs, it can mostly recover after stopping the drugs. If liver enzymes are elevated, drugs to protect liver function such as reduced glutathione and ursodeoxycholic acid can be given, in addition. Certain herbs also have liver-protective effects.