The degree of danger of low neutrophils and high lymphocytes is related to the cause, usually not more dangerous if common viral infections, more dangerous if recrudescence. Low neutrophils and high lymphocytes can be categorized in two ways: an increase in the number of lymphocytes, resulting in a higher percentage of lymphocytes. A decrease in the number of neutrophils, resulting in an increase in the percentage of lymphocytes. 1. If caused by viral infections, such as chickenpox, mumps, rubella, etc., the danger is generally less severe and can be treated with active antiviral therapy. 2 If it is caused by reocclusion, lymphocytic leukemia, radiotherapy, recovery from acute infectious diseases, etc., the condition is more dangerous if it is reocclusion. Low neutrophils and high lymphocytes can also be seen in other diseases, and need to be combined with other tests and laboratory tests to clarify the diagnosis of the disease. It is recommended to go to the hospital in time for diagnosis and treatment.