Increased alanine aminotransferase is considered to be caused by diseases of the hepatobiliary system, while the most common is a history of chronic viral hepatitis, which can lead to decreased liver function, liver cell damage, and increased transaminases if prolonged. The obstruction and secondary infection of the biliary system can also result in abnormal bilirubin, leading to abnormal liver function and increased enzymes, and the patient will also have significant right upper abdominal pain, nausea, and vomiting. For patients with malignant tumors, after intravenous chemotherapy, pharmacological liver damage will also result in increased transaminases, and liver-protective and hepatoprotective drugs should be routinely given during treatment. If the transaminases are more than 2-3 times the normal value, the dosage should be reduced or discontinued as appropriate and liver-protective and enzyme-lowering drugs should be applied intravenously. You should also pay attention to increase the nutrition of your diet, eat more high-protein food and vitamin-rich food, and monitor the changes of liver function index regularly.