The diagnostic criteria for pediatric anemia are actually written very clearly in the textbooks. Anemia is classified as mild anemia, moderate anemia, severe anemia and very severe anemia. The diagnosis of anemia is based on the amount of hemoglobin, which is 90-110g/L for mild anemia, manifested as slightly pale skin and mucous membranes, 60-90g/L for moderate anemia, which may manifest as slightly pale skin and mucous membranes, and may have weakness after activity, and 30-60g/L for severe anemia, which has obvious symptoms, manifested as The pale skin and mucous membranes are more obvious, and there may be panic and shortness of breath after a little activity. If the hemoglobin of very severe anemia is below 30g/L, the child may become weak or even have heart failure after a little activity, which may cause life-threatening problems in more severe cases. Therefore, for anemia, you should pay attention to the child’s performance.