Lymphocytes are lymphocytes, increase consider physiological factors such as physiological increase in children, pathological factors such as infectious diseases, transplant rejection, etc. It is recommended to consult a specialist. The normal value of lymphocytes is 20%-40%, and the absolute value is (1.8-4)*10^9/L. The results may vary depending on the machine. 1. Physiological increase: mainly seen in childhood, especially in infants, lymphocytes account for about 35% at birth, and gradually reach normal adult level after 4-6 years old. 2. Pathological increase: Infectious diseases include viral infections, such as measles, chicken pox, viral hepatitis, etc. It can also be seen in adenovirus, Bordetella pertussis, Brucella, toxoplasmosis and other infections. Increased lymphocytes can also be seen in mature lymphocytic tumors, recovery from acute infectious diseases, and transplant rejection. In addition, if the neutrophils are reduced, the relative increase in the proportion of lymphocytes but not the absolute value can be seen in aplastic anemia, granulocytopenia, etc.. Abnormal increase of lymphocytes should be examined in time to clarify the cause of the disease.