Leukocytes 16.6×10⁹/L is relatively high, and it is necessary to determine whether there are any foci of bacterial infection, tissue damage, and bone marrow proliferation in the body. 1. Under normal circumstances, the number of white blood cells in adults is between (4 and 10) × 10⁹/L. Reaching 16.6 × 10⁹/L is the first indication that a serious bacterial infection may be present. Attention is paid to monitoring the body temperature to determine whether there is an elevated temperature and to determine whether there is a respiratory bacterial infection, gastrointestinal infection, urinary tract infection, or pelvic infection. Medication includes levofloxacin, etc. 2. In addition to bacterial infection, other conditions such as myocardial injury and necrosis may also induce an increase in the number of white blood cells, which needs to be diagnosed according to the patient’s clinical symptoms and other laboratory tests. 3. Malignant hematologic diseases: such as acute leukemia, which can also lead to elevated white blood cell counts, and requires bone marrow aspiration to make a definitive diagnosis. When the white blood cell count is found to be elevated, it is necessary to find out the cause of the elevated white blood cell count, and it is recommended to consult the internal medicine department of a regular hospital first, and standardize the treatment under the guidance of the physician.