There is a difference between blood tests in the morning and in the afternoon. The morning and afternoon blood counts are different. When you first wake up in the morning, the blood count is lower, while in the afternoon the blood count will be higher. Because of normal physiological factors, the increase is within a certain range and does not exceed the normal reference range. Strenuous exercise can cause an increase in white blood cell count up to 35×10^9/L. In addition, there are also factors in the plateau area, and patients who come down in the plateau can also cause high blood count results. These are physiological factors and do not need to be considered. Under normal circumstances, the patient’s region should be asked to determine if the results are accurate.