High AFP may be caused by certain physiological phenomena such as pregnancy, or it may be caused by certain diseases such as benign lesions, neoplastic diseases, etc. It is suggested that patients should further clarify. 1. Physiological: pregnant women and newborn babies may also have high AFP quantitative phenomenon, in which the highest value of AFP is found in pregnant women in the 7th~8th month of pregnancy, and usually AFP will gradually return to normal after passing this special period. 2. Pathological: such as hepatitis, cirrhosis and other benign lesions can cause high AFP, after active treatment of the primary disease, the AFP can be restored to normal level. In addition, high AFP is common in primary liver cancer and germ cell malignant tumor and other tumor diseases. Patients should go to the hospital in time for further examination to clarify the cause of elevated AFP and take targeted treatment according to the cause.