Leukocytes 6.0×10^9/L and high neutrophil percentage may be related to bacterial infection, rheumatic disease, poisoning and other causes. 1. Bacterial infection: high percentage of neutrophils can be found in routine blood tests during bacterial infection. This may be related to the neutrophils being active in removing pathogenic microorganisms. 2. Rheumatic diseases: patients suffering from rheumatoid arthritis, systemic lupus erythematosus and other rheumatic diseases, the patient’s immune system functions abnormally, and the situation of high neutrophil percentage may also occur with leukocytes of 6.0×10^9/L. 3. Poisoning: When poisoning occurs to hydride, carbon monoxide and other poisoning will stimulate the body’s immune system, may lead to leukocyte 6.0 × 10^9 / L, neutrophil percentage high. Leukocytes 6.0×10^9/L, high neutrophil percentage may also be related to other causes. It is recommended to go to the hospital as soon as possible, and cooperate with the doctor to improve the relevant examination to clarify the cause of the disease.