The clinical diagnosis of anemia is mainly through the following aspects: first, whether there are clinical symptoms of anemia, such as general weakness, dizziness, palpitations, chest tightness after activity, shortness of breath, and other symptoms of anemia. Secondly, the presence of physical signs of anemia, such as pale skin and mucous membranes, pale lips, nail beds, lid conjunctiva, etc., should also be observed. Again, it is important to observe whether there is scleral yellowing and other conditions. Finally, laboratory tests should be performed, such as routine blood tests for decreased hemoglobin and red blood cells, and to observe whether there are changes in the number of white blood cells and platelets. In some patients, a bone marrow aspiration test is required to understand the myeloproliferation and to clarify the cause of anemia. Therefore, anemia is diagnosed by clinical symptoms, clinical signs, and laboratory tests, including routine blood and bone marrow aspiration tests.