High neutrophil percentage is related to acute infection, severe tissue injury and massive blood cell destruction, acute hemorrhage, leukemia and some malignant tumors, as well as physiological factors such as strenuous exercise. 1. Acute infection: acute infection caused by staphylococcus aureus, hemolytic streptococcus, pneumococcus and other pathogenic bacteria can cause high percentage of neutrophils. 2. Severe tissue injury and large amount of blood cell destruction: severe trauma, large surgery, large burns, and severe intravascular hemolysis can cause high percentage of neutrophils. 3. Acute hemorrhage: within 1 to 2 hours after acute hemorrhage, the neutrophil percentage will be high. 4. Leukemia and some malignant tumors: leukemia, primary thrombocythemia, liver cancer, stomach cancer and other diseases can cause high neutrophil percentage. 5. Physiological factors: late pregnancy, strenuous exercise, full meal, after shower, high temperature, after labor and other factors can cause a temporary increase in neutrophil percentage. There are many reasons for high neutrophil percentage, you need to go to the hospital in time, clarify the cause of the disease and follow the doctor’s instructions for treatment.