There is no such thing as “how high a child’s blood count is dangerous”. To determine whether a child is at risk, a combination of symptoms, signs and laboratory findings are needed. Blood tests, usually referred to as routine blood tests, help determine the condition of a child by checking the number of blood cells and their distribution. It contains dozens of indicators such as red blood cell count, hemoglobin count, white blood cell classification, and platelets. Each index has its own specific meaning. However, blood test is only one of the many criteria to determine the condition. It cannot be used in isolation from the patient’s symptoms and signs, or from the results of other tests. Using routine blood test results alone to determine a patient’s condition is prone to misdiagnosis and missed diagnosis. Therefore, it is not a scientific way to judge how high a child’s blood count is. If a child is sick, it is recommended to actively seek medical attention to identify the cause and cooperate with the doctor to start treatment.