Neutrophil 12.8 should refer to a neutrophil count of 12.8 x 10⁹/L in the blood, which is a more severe elevation. The normal value of neutrophil count is (1.8~6.3)×10⁹/L. When the absolute value of neutrophils is higher than 6.3×10⁹/L, it can be called agranulocytosis. Therefore, the neutrophil count of 12.8×10⁹/L is already higher than normal, and it is necessary to be alert to the possibility of disease. Clinically, neutrophilia can be seen in acute infections, acute hemorrhage, acute poisoning, hematologic neoplasms and other diseases. Diagnosis of the cause of increased granulocytes, need to be combined with the patient’s specific clinical manifestations, as well as other auxiliary examination results, based on the performance of increased neutrophils can not be clear cause of the disease, it is recommended to seek professional medical help. In summary, the neutrophil count of 12.8×10⁹/L suggests that there is a more serious elevation of neutrophils, and if this occurs, please go to the hospital in time for diagnosis and treatment.