A high lymphocyte ratio may be the result of pathologic diseases, such as leukemia, tuberculosis, viral colds and other diseases, or it may be a physiologic manifestation. 1. Lymphocyte ratio refers to the ratio of lymphocyte count to the total number of white blood cells. When tuberculosis and viral infections occur, such as tuberculosis and influenza, elevated lymphocyte counts, which lead to high lymphocyte ratios, are common causes. In addition, when diseases such as acute lymphoblastic leukemia and chronic lymphoblastic leukemia occur, lymphocyte counts are significantly elevated, and lymphocyte ratios are also significantly elevated. When lymphoma invades the bone marrow, there may also be elevated lymphocytes, causing an elevated lymphocyte ratio. All of the above are elevated lymphocyte ratio caused by pathologic diseases, which require timely medical treatment, and treatment for specific diseases, such as chemotherapy with cyclophosphamide, vincristine and other drugs for lymphoma patients. 2. The counts of lymphocytes, neutrophils, basophils, eosinophils and monocytes of normal people change dynamically within the normal range, and the situation that the lymphocyte count is normal but the lymphocyte ratio is high may occur, which is a kind of physiological manifestation and relative elevation, and does not need to be treated. It is recommended that the patient should go to the hematology department in time, complete the relevant examinations to clarify the causes of the elevated lymphocyte ratio, and then take treatment under the guidance of the physician for the specific causes of the disease.