The normal range of leukocytes is between 4-10×10^9/L. There are two possibilities for high leukocytes, physiological increases such as strenuous exercise, labor, heat, cold, emotional stress, women’s menstrual periods, pregnancy, and childbirth can all have increased leukocytes. There is also infection, that infection leukocyte increase, the presence of infection does not necessarily appear fever, it should be considered in conjunction with whether it has a lung infection, urinary tract infection or other infections. If it is physiologically elevated, then it is even less likely to have a fever. So that high white blood cells will not necessarily have a fever, but also in combination with other symptoms, after examination to know the specific situation.