Low lymphocytes means that the percentage of lymphocytes is lower than the lower limit of the reference interval, which is mostly seen in bacterial infection, acute intoxication, aplastic anemia and immunodeficiency. The reference range for the percentage of lymphocytes in human peripheral blood is 20%~50%, and the absolute value is (1.1~3.2)×10^9/L. If the test result is lower than the reference range, it means that the lymphocyte percentage is low, which includes the percentage and the absolute value. 1. If the percentage of lymphocytes is low, it is usually caused by the presence of bacterial infection, acute poisoning, tissue damage and other conditions in the body. 2. Low absolute values of lymphocytes are usually associated with aplastic anemia, acute leukemia, immunodeficiency diseases, gammaglobulin deficiency and other diseases. Therefore, if low lymphocytes are found in routine blood tests, you should cooperate with your doctor to further improve the relevant tests and make a clear diagnosis. Daily need to pay attention to rest, avoid overwork. Appropriate exercise to enhance the resistance. Specific treatment should be carried out under the guidance of physicians.