High white blood cells in children may be related to non-disease factors, disease factors, and there are various types of white blood cells, different types of high white blood cells may suggest different causes. It is recommended to consult a doctor in time for further examination to clarify the cause. 1. Non-disease factors: Non-disease factors that lead to high white blood cell counts include daytime changes, exercise and emotional changes, age changes, etc. Usually, white blood cell counts may be higher in the afternoon of each day; strenuous exercise and emotional excitement may also increase white blood cell counts; and white blood cell counts of normal newborns and infants may also be higher. 2. Disease factors: White blood cells can be categorized into neutrophils, eosinophils, basophils, lymphocytes and monocytes, and different cells have their own reasons. (1) High neutrophils. Usually indicates acute infection, injury, poisoning, etc., or related to blood diseases, such as acute leukemia. (2) Eosinophils are high. Usually associated with parasitic infections, allergic diseases, skin diseases, malignant tumors, etc. (3) High basophilic granulocytes. Related to allergic diseases, some malignant tumors, hematological diseases, etc. (4) High lymphocytes. Related to some infectious diseases such as tuberculosis, herpes pharyngitis, or lymphatic system tumors. (5) High monocytes. Related to infections, some blood diseases. The increase in white blood cell count can only initially suggest that there may be an abnormality, and the specific cause should be clarified after further examination.