Normally white blood cells should be between (4-10) x 10^9/L. White blood cells 24.7 x 10^9/L are higher than normal, and there are several reasons to consider. White blood cells are an important part of the body’s immune system, if there is a bacterial infection, the body will activate the defense function, so that the white blood cells are elevated for phagocytosis of bacteria. It can be seen in: acute infection, severe trauma, after major surgery, extensive burns, acute heart attack and other serious tissue damage; acute blood loss or acute hemolysis; acute poisoning, including uremia, diabetic ketoacidosis and other metabolic poisoning or chemical poisoning, such as lead, mercury or sleeping pills poisoning; leukemia and malignant tumors and other diseases. There are many causes of elevated white blood cells, but bacterial infections that cause elevated neutrophils generally do not exceed three times the upper limit of normal. If it exceeds three times of the upper limit, it should be considered to be related to leukemia, and it is necessary to improve the bone marrow and other related hematological examinations to make a clear diagnosis, and it is recommended to go to the hospital in time to consult the doctor.