There are more causes of high liver function, and the more common causes are as follows. 1. viral hepatitis caused by infection with certain viruses, such as hepatitis B virus infection, hepatitis C virus infection, viral hepatitis A, viral hepatitis E, etc. often cause elevated liver function transaminases. 2. alcohol consumption, commonly seen in patients who drink a lot of alcohol in a short period of time or for a long time. 3. fatty liver, mostly seen in obese people, because of diet The fatty liver is usually found in obese people, because the fat deposited in the liver after excessive dietary intake leads to inflammation and necrosis of liver cells.4. Some congenital metabolic diseases, such as glycogen accumulation disease, hepatomegaly, etc..5, necrosis, leading to abnormal liver function.