Blood picture usually refers to routine blood tests, which mainly include white blood cell count and classification, total red blood cell count and hemoglobin content. A high blood count generally refers to a routine blood test in which the white blood cell count is outside the normal range. Infection, trauma, blood disorders, etc. may cause a high blood count. The normal range of white blood cell count for adults should be (3.5-9.5)×10^9/L. A white blood cell count higher than 9.5×10^9/L is called leukocytosis, which is manifested as high blood count. The most common cause of high blood count is infection, including bacterial infection and viral infection. Leukocytes mainly include granulocytes and lymphocytes, if lymphocytes are significantly elevated, it suggests a viral infection; if neutrophils are significantly elevated, it suggests a bacterial infection. In addition, serious tissue injury such as major surgery; acute hemorrhage, hemolysis; toxic reactions such as metabolic poisoning or chemical poisoning, as well as advanced malignant tumors may show elevated blood picture. The application of certain drugs such as glucocorticoids, as well as hematopoietic stem cell disorders, autoimmune diseases, gout, and severe hypoxia may cause neutrophilia as well as increased white blood cell counts, which may manifest as high blood counts.