Routine blood tests can be done in the afternoon. There is no problem with routine blood tests in the afternoon. Because routine blood test is to draw the patient’s blood through a vein and then examine it under the blood cell analyzer, there is no obvious relationship with what time to check the routine blood. The routine blood test can find out whether the number of white blood cells in the patient’s peripheral blood is normal, and also whether the ratio and number of various types of cells in the white blood cells are normal, and also whether the number of red blood cells in the peripheral blood is normal and whether there is anemia. If there is anemia, it can also find out whether it is microcytic hypochromic anemia, macrocytic anemia or orthocytic anemia, providing a general judgment on the diagnosis of anemia. In addition, the routine blood test can also find out whether the patient’s platelet count is normal, whether the platelet count is increased or decreased.