The reason for the low percentage of lymphocytes and high neutrophils is to consider the possible existence of bacterial infection. 1. Under normal circumstances, the normal value of blood test lymphocytes is between 20%~40%, and neutrophils are between 50%~70%. If the percentage of lymphocytes is lowered and the percentage of neutrophils is raised, the first consideration is that there may be bacterial infection. 2. When bacterial infection is suspected, we need to monitor the body temperature to determine whether the temperature is higher than 37 degrees, and we need to find out whether there is a bacterial infection foci in the body according to the patient’s clinical symptoms, and when bacterial infection foci are found, we need to use antibiotics to treat them in a timely manner. In addition, blood system diseases, stress, poisoning, etc. can also appear neutral high lymphatic low. If the percentage of lymphocytes is low and the level of neutrophils is high, it is necessary to consult the relevant departments (such as hematology, infectious diseases, general internal medicine, etc.) to clarify the cause and to treat the disease.