Iron deficiency anemia is anemia that occurs when the body’s stored iron is depleted and cannot meet the needs of normal red blood cell production, and it belongs to small cell hypochromic anemia, and the stage before the appearance of anemia is called iron deficiency. Iron is an essential trace element in the human body, which not only participates in the synthesis of hemoglobin, but also in some biochemical processes in the body. Therefore, when anemia occurs, there are some symptoms associated with iron deficiency in addition to the symptoms of anemia. For example, pale skin and mucous membranes are caused by a decrease in the amount of hemoglobin in the blood. Most of iron deficiency anemia can be prevented by enhancing the immunity of the body through balanced diet and exercise; if there is a primary disease, it should be actively and timely treated to improve it. Prevention: For patients with iron deficiency, it is better to eat iron-rich diet and its fortified foods, eat more animal protein, strengthen education on nutrition and maternal and child health care, such as improving infant feeding, advocating breastfeeding and timely treatment, actively carry out parasite control, for the prevention and treatment of excessive menstruation, foreign countries mostly use birth control rings and administer 20μg of progesterone daily, which can reduce menstruation. Care: 1. Give special attention to diet with high iron and high vitamin C food. Such as animal liver, lean meat, blood, egg yolk, beans, fungus, shiitake mushroom, kelp and other foods. Correct the habit of partial eating. 2, maintain oral hygiene, rinse your mouth before and after meals, brush your teeth before bedtime and in the morning; when there is bleeding in the mouth, use a soft-haired toothbrush. 3, do a good job of skin care, often with warm water bath, keep the skin clean.