The results of routine blood tests will be available in about five to ten minutes after the blood is drawn. The main items of routine blood tests include white blood cells, red blood cells, hemoglobin, platelets, etc. By observing the number of white blood cells, we can determine whether there is an infection. A decrease in white blood cell count can be caused by a variety of reasons and requires a hospital visit to complete the appropriate tests. Observe the number of hemoglobin and red blood cells, based on the value of hemoglobin and red blood cells can determine whether the patient has anemia, the value of hemoglobin is below the normal value above 90g/L is considered to be mild anemia, 89g/L-60g/L is moderate anemia, 59g/L-30g/L is severe anemia, below 30g/L is very severe anemia, anemia needs to be checked to clarify the type of anemia. Observe the platelet count. Platelet values above normal may be due to myeloproliferative disorders, while low platelets are commonly caused by immune-related thrombocytopenia. Any abnormal blood cell count requires a visit to the hospital to improve the appropriate laboratory tests to clarify the cause.