For patients with iron deficiency anemia, common anemia classifications as well as blood supplementation and anemia treatment methods are as follows: 1. Mild iron deficiency anemia: you can eat more animal offal, such as chicken liver, duck liver, pig liver, and more lean meat or eggs, which have a high iron content. Milk is nutritious, but milk is mainly protein-based, and the iron content is not very high. Although the above foods are high in iron, excessive intake needs to be avoided because poor absorption by the organism can affect the results. Patients with iron deficiency anemia need to avoid drinking strong tea and coffee, otherwise it will cause iron absorption disorder and lead to further aggravation of iron deficiency anemia. 2. moderate and severe iron deficiency anemia: patients need to take iron supplements, the specific method of supplementation should follow the doctor’s advice and avoid buying drugs from pharmacies to take on their own, because iron supplements have certain side effects on the organism. When patients have iron-deficiency anemia, they need to clarify the cause and treat the original disease in order to achieve better relief of iron-deficiency anemia as well as to achieve the purpose of curing iron-deficiency anemia, so timely treatment in the hospital is the right choice.