When the amount of red blood cells in human blood decreases, the oxygen supply to body tissues and organs is insufficient, resulting in a series of symptoms in the body called anemia. Supplementary treatment can be given according to the causes that cause anemia in the body: i. Hemolytic anemia: 1. Anti-shock: rehydration and blood transfusion therapy are given in the acute stage to expand blood volume and resist shock; 2. Glucocorticoids: such as prednisone, etc. Glucocorticoids are clinically used as the drugs of choice for hemolytic anemia; 3. Immunosuppressants: such as cyclophosphamide and azathioprine, etc. Immunosuppressants are often used in glucocorticoid therapy Patients with refractory hemolytic anemia who are ineffective. Second, hemorrhagic anemia: patients with excessive blood loss in the acute stage should be immediately treated with homozygous blood transfusion to avoid life-threatening blood loss, and the location of the bleeding should also be found immediately for hemostatic treatment. III. Iron-deficiency anemia: Iron agents such as inorganic ferrous sulfate and organic iron dextrose can be taken orally. For those who have obvious side effects of oral iron, parenteral iron agents, such as iron sucrose and iron dextrose, can be used for intravenous infusion; vitamin C can also be taken during the period of taking iron agents to promote the absorption of iron in the body. Fourth, megaloblastic anemia: 1. supplement folic acid: actively treat the primary disease to supplement folic acid, you can take folic acid tablets orally, and those with gastrointestinal absorption disorders can inject calcium tetrahydrofolate intramuscularly, etc.; 2. supplement vitamin B12: you can take vitamin B12 tablets orally, and those with gastrointestinal absorption disorders can inject vitamin B12 injection intramuscularly. Caution: After iron supplementation, it will cause black stools, patients do not need to be overly nervous, usually the symptoms will disappear after stopping the drug. Pay attention to regular daily rest, avoid strenuous exercise, usually eat some red meat and animal offal, such as beef, chicken liver, etc. Also pay attention to a balanced diet, eat more fresh fruits and vegetables, and go to the hospital for regular review.