Girls are more prone to anemia than boys, and the most common type of anemia in girls is iron-deficiency anemia, which can also include nutritional anemia, hemolytic anemia, and chronic anemia. Iron-deficiency anemia is the most common and is determined by the physiological characteristics of women. Girls, especially those in their childbearing years, lose red blood cells every month with their menstrual periods, and are not given effective replenishment during the process of loss, so long-term loss can cause iron deficiency in the body. Iron is an important raw material for the synthesis of hemoglobin, and if the body is deficient in iron, the synthesis of hemoglobin will be reduced, resulting in anemia.