Mild cases of fatty liver do not usually cause elevated transaminases, but moderate to severe cases of fatty liver or steatohepatitis can cause elevated transaminases. However, there are many reasons for elevated ALT, such as the effects of diet or taking certain liver-damaging drugs that can also cause transient elevation of transaminases, as well as factors such as staying up late or being stressed, which may also lead to mild elevation of ALT, and also transient liver function impairment after strenuous exercise. If the patient has a mild elevation of ALT and viral hepatitis or alcoholic liver is ruled out, the patient can be temporarily observed. If the review reveals that the transaminases continue to rise or there is a high suspicion of other causes of liver function damage, the patient needs to cooperate with the doctor to give a detailed examination and, if necessary, cooperate with the doctor to use liver protection and enzyme-lowering medication.