Low lymphocytes and neutrophils are mainly seen in viral infectious diseases or hematologic diseases. Viral infections are often treated with antiviral therapy and the lymphocytes and neutrophils will return to normal. Hematologic diseases require bone marrow aspiration to further diagnose the type of disease and receive targeted treatment. 1. Acute viral infections: common clinical diseases include viral colds, rubella, viral hepatitis, mumps, etc. Doctors will use targeted medications according to the patient’s condition, including oseltamivir. 2. Blood system diseases: such as aplastic anemia, lymphocytic leukemia, etc. can also lead to abnormally high lymphocytes and low neutrophils. Patients need to go to the hospital for professional examination to confirm the type of disease and target treatment. For example, patients with aplastic anemia can take oral cyclosporine treatment. If the patient has high lymphocytes and low neutrophils, the diagnosis should be made under the guidance of the doctor according to the characteristics of the patient’s medical history, clinical symptoms, physical examination, auxiliary examination and other information, and do not diagnose blindly on your own, so as not to affect the condition. The use of drugs is under the guidance of physicians.