What information can be reflected from the report after doing routine blood test? 1. The presence or absence of infection in the organism, and distinguish whether it is a bacterial or viral infection. If the total white blood cell count is elevated and the neutrophils are elevated, the infection is often bacterial. If the total leukocyte count is not high or is decreased, and the lymphocytes or monocytes are elevated, the infection is often viral. If possible, combine with CRP to distinguish bacterial or viral infection. The diagnosis of anemia can be made if RBG and HGB are below the reference range, and the type of anemia can be differentiated according to MCV, MCH and MCHC: orthocytic anemia, microcytic anemia hypochromic anemia, macrocytic anemia, and simple microcytic anemia. It can also be classified according to RDW, which mainly reflects the degree of inconsistency in the size of red blood cell volume and is meaningful in combination with MCV for the diagnosis and differentiation of anemia classification.3. Platelet condition: Look for the presence of thrombocytopenia and thrombocytosis. It can also be combined with MPV to identify the cause of platelet reduction and evaluate bone marrow hematopoietic function, etc. 4, whether the body has allergic reactions and parasitic infections. Eosinophils tend to increase when the body has allergic reactions or parasitic infections. 5. The presence of hematologic diseases: acute leukemia is associated with a dramatic increase in leukocytes and changes in classification: elevated naive cells, eosinophils or basophils. In the case of remittance, the triple system will be reduced. 6.Long-term exposure to radiation, long-term use of antibiotics and antitumor drugs can cause a decrease in total leukocyte count and abnormal classification. 7.Drug efficacy observation, disease monitoring application. 8, if there are abnormal items, it is best to do a peripheral blood smear test to see whether there are abnormalities in the morphology, number of white blood cells, red blood cells and platelets, and whether there are abnormalities in staining, so as to rule out blood system diseases. Note: There are many factors affecting the routine blood test, such as patient’s emotion, exercise, after eating, cold and other changes will cause changes in the routine blood, some items also have the effect of time, so the routine blood test should be fixed time, testing in the same state, the results can be stable. Secondly, the test results must be analyzed in conjunction with the symptoms. If there are no clinical symptoms, there is no need to worry about the results even if they are abnormal.