What is the cause of high white blood cell count?

The normal range of white blood cells in normal adults is between 4000-10000/ml. If the white blood cell count is high, it may be related to emotional excitement, exercise, cold weather, heat, etc. Secondly, when bacterial infection, massive bleeding, acute poisoning, tissue necrosis, etc. occur, as well as acute and chronic leukemia, there will also be an increase in the number of white blood cells.