Increased glutamyl aminotransferase (GGT) suggests the possibility of biliary tract obstructive disease, viral hepatitis, alcoholic hepatitis and other diseases. 1. Biliary tract obstructive disease: when bile duct stones, cholangiocarcinoma and hepatocellular carcinoma occur due to obstruction in the liver, hepatocytes can produce GGT in large quantities, and cancer cells can also synthesize GGT, so that GGT increases significantly. 2. Viral hepatitis: inflammation of liver cells due to viral infection. If GGT continues to rise, it suggests that the lesion is in active stage or the condition is deteriorating. 3. Alcoholic hepatitis: liver disease due to heavy drinking. elevated GGT is one of the characteristics of alcoholic liver disease. 4. Non-alcoholic steatohepatitis, which can also be characterized by elevated GGT. There are other causes of elevated glutamyl aminotransferase (GGT), such as schistosome infection and pharmacologic liver injury, etc. If elevated GGT occurs, you should seek medical attention to clarify the cause of the disease and follow the doctor’s instructions for treatment.