High white blood cells may be caused by different reasons, physiological high may be a normal physiological phenomenon in pregnancy or newborns, usually without treatment; pathological high requires targeted treatment according to the original disease to reduce the high white blood cell value back to normal: 1. physiological high: 1. mid to late pregnancy: neutrophils in the white blood cell count is significantly higher, this is a normal physiological phenomenon, generally This is a normal physiological phenomenon, which is generally transient and can be restored to normal values after delivery; 2. Neonates: neonatal white blood cell counts are higher compared to adults, and will gradually return to normal as they grow older. Pathologically high: 1. Drugs: The application of glucocorticoids can increase the white blood cells, which can generally return to normal after discontinuation; 2. Infection: Infection is a common cause of elevated white blood cell counts. High white blood cells caused by infection need to be treated symptomatically with antibiotics, such as penicillin, amoxicillin, ceftriaxone, streptomycin, etc. When the symptoms of infection are controlled, high white blood cells can drop to normal; 3. Blood diseases: acute leukemia, chronic leukemia, etc., may cause abnormal bone marrow hematopoiesis, all of which can cause significantly elevated white blood cells. In this case, it is necessary to go to the hospital for comprehensive treatment, such as chemotherapy, immunosuppression and leukapheresis, etc. Only after systematic treatment can the high white blood cells be reduced.