The values commonly looked at in routine blood tests are white blood cells, neutrophils, lymphocytes, platelets, hemoglobin, red blood cells, and eosinophils. 1. Blood routine is the most basic examination program in the hospital. It can reflect many clinical diseases. For example, white blood cells, neutrophils and lymphocytes are generally used to determine whether an infection exists and to distinguish whether it is a bacterial infection or a viral infection. Usually, an increase in white blood cells and neutrophils represents a possible bacterial infection, while an increase in lymphocytes represents a possible viral infection. 2. Platelets are generally used to test the coagulation function. Low platelets generally represent coagulation disorder and should be alerted to bleeding; increased platelets indicate that the body’s blood is in a hypercoagulable state and prone to thrombosis. 3. Red blood cells and hemoglobin are often observed in anemia. Especially hemoglobin is important for grading of anemia. Such as severe anemia, hemoglobin less than 30g / L; moderate anemia, hemoglobin in 30 to 60g / L; mild anemia is 60 to 90g / L. 4. Eosinophils, on the other hand, can be used to initially determine whether there is an allergy. If you find that the blood routine is abnormal, you should consult a doctor in time.