An alpha-fetoprotein of 23 μg/L is in the normal range but high, and a high alanine aminotransferase of 51 U/L suggests mild elevation. The severity of the elevation is related to the cause of the elevation. If the cause is physiological, it can be normalized after removing the trigger. If it is viral hepatitis, liver cancer and other pathologic causes of the two elevations, timely treatment is needed. The normal value of alpha-fetoprotein is 25ng/L. At present, it is mainly used for the diagnosis of hepatocellular carcinoma and the monitoring of its efficacy. The normal value of alanine aminotransferase is 5~40U/L, which is an important indicator to reflect the liver function injury. It can be seen from the above that alpha-fetoprotein 23μg/L and alanine aminotransferase 51U/L are both in the high range, and the elevation of both can be attributed to the following reasons. 1. Physiological reasons: pregnant women’s serum alpha-fetoprotein value will be elevated, after delivery will return to normal, the general value of <400μg / L. If this time combined with improper diet, stay up late, mental stress and other physiological factors, may appear in both the situation of high. By improving the diet, lifestyle habits and other methods to remove the causes, can make the two return to normal. 2. Pathologic causes. (1) Benign liver disease: such as viral hepatitis, cirrhosis, etc. can cause high levels of both, at this time through antiviral, hepatoprotective and other causative treatment, the prognosis can be. (2) Malignant tumors: such as primary liver cancer, testicular cancer, etc. can also cause high levels of both, which need to be treated with surgery, chemotherapy and other treatments according to the cause of the disease, and the prognosis is not good. There are many other reasons for the elevation of both, it is recommended to consult a doctor to assess the severity of the disease and carry out standardized treatment to avoid adverse effects.