Anemia is only a clinical manifestation, not a disease. Iron deficiency anemia is one kind of anemia, and anemia includes iron deficiency anemia. The specific differences between the two are as follows: I. Iron deficiency anemia: mainly small cell hypochromic anemia caused by iron deficiency in human body. In iron deficiency anemia the cell volume including MCV, MCH, and MCHC are significantly reduced. Second, anemia refers to a syndrome in which peripheral blood erythrocytes and hemoglobin are lower than normal and cause abnormalities in various functions of tissues and organs. Anemia includes the following types: 1. Anemia includes nutritional anemia, and nutritional anemia includes iron deficiency anemia and megaloblastic anemia, which is divided into megaloblastic anemia caused by folic acid deficiency or megaloblastic anemia caused by B12 deficiency; 2. Anemia also includes hemolytic anemia, thalassemia and renal anemia; 3. anemia, or blood loss anemia. For example, chronic gastrointestinal blood loss and blood in stool caused by pernicious tumors or ulcers in the digestive tract, and hemorrhagic anemia caused by hemorrhage after trauma.