Neutrophils are a type of white blood cell. The neutrophil ratio, which generally represents the ratio of neutrophil count to total white blood cells, is generally not clinically significant when the neutrophils alone are low but the total white blood cell count is normal. Therefore, attention can be paid to the absolute neutrophil value to determine whether treatment is needed: I. Mildly low values: The normal adult neutrophil ratio is usually 50%-70%, while the normal range of absolute neutrophil values is (1.8-6.3) × 10^9/L. Values <1.5 × 10^9/L are neutropenia. It can be seen in cases of malnutrition, influenza, etc. 1, malnutrition: patients with significantly lower weight than normal can adjust their diet to adequately and balancedly supplement various nutrients to improve neutrophil levels; 2, influenza: patients with cold symptoms such as nasal congestion, runny nose, cough, etc. can drink more water, urinate more, promote metabolism, and if necessary, can also take Pancreatic granules, Vitamin C Yin Qiao tablets, etc. 3, other: urticaria, rubella, viral hepatitis, typhoid, paratyphoid and other conditions are relatively heavy, generally need to apply drugs and other methods of treatment for the cause. For urticaria generally by oral loratadine, and local application of furnace glycolic lotion for relief. Patients with rubella and other viral infections can take acyclovir and valacyclovir as prescribed for antiviral treatment after the cause is clear. For patients with bacterial infections such as typhoid and paratyphoid, antibiotic drugs such as levofloxacin and aspirin can be taken for treatment. Second, neutrophil deficiency: when the value is <0.5×10^9/L, it is common in leukemia, aplastic anemia, connective tissue disease, chronic active hepatitis, lymphoma and other diseases. Patients with obvious neutrophil deficiency are highly susceptible to various infectious diseases, so they should go to the hospital as soon as possible to clarify the cause and provide corresponding treatment. When anemia is present, it needs to be corrected promptly, such as blood transfusion or transfusion of blood components. For patients with tumors or cancer-like diseases, immunotherapy or targeted therapy can be applied according to medical prescription. Patients who have received long-term radiotherapy or chemotherapy, as well as those taking antineoplastic drugs or antidiabetic drugs, may also have low neutrophil ratios and low white blood cell values.