An alanine aminotransferase of 72 U/L is considered mildly elevated and is usually not serious if there is no physical discomfort, but may be serious if gastrointestinal symptoms or other organic diseases are present. Common causes of elevated ALT include heavy drinking, frequent late nights, drug-induced liver injury, intrahepatic bile duct stones, chronic hepatitis, cirrhosis, and fatty liver. The normal reference value for alanine aminotransferase is 0 to 40 U/L, which may vary from kit to kit or laboratory measurement. Glutaminase is found in various cells, mainly in heart and liver cells. It is generally recognized that liver injury is indicated when the alanine aminotransferase exceeds 2.5 times the upper limit of normal and persists for more than half a month. When alanine aminotransferase is elevated, it is recommended to consult the gastroenterology department in a timely manner, improve the abdominal ultrasound, abdominal CT, liver function, hepatitis virus antibody and other related examinations, can not rely on a single indicator to assess the severity of the disease, to clarify the cause of the disease, the treatment of the cause of the disease, and treatment under the guidance of the doctor, to avoid delaying the disease.