Anemia check blood routine, blood film, reticulocyte count and bone marrow in order to know what type of anemia it is. 1. Routine blood test: It mainly includes checking the white blood cells, red blood cells, platelets and hemoglobin in the blood, which can be used to diagnose whether there is anemia or not. 2. Blood film examination: by observing the morphology of various red blood cells and other blood cells in the blood film, in order to diagnose the cause and nature of anemia. 3. Reticulocyte count: This test can well reflect whether the bone marrow hematopoiesis is active or not. 4. Bone marrow examination: generally includes bone marrow cell morphology, bone marrow biopsy, pathology, flow cytometric immunophenotyping, chromosomal fusion genes as well as gene mutations, etc. Through bone marrow aspiration, the nature and cause of anemia can be clarified. In addition, acidified serum hemolysis test, anti-human globulin test, and hemoglobin electrophoresis can be combined to further determine the type and mechanism of anemia.