Platelets are an important component of the blood and have the function of stopping bleeding. Generally speaking, it is the lowest in the morning and slightly higher in the afternoon, and then for the season, it may be lower in the spring and higher in the winter. However, none of them exceeds the normal range. The normal range is (100-300)×10^9/L. For myeloid disorders, which can also cause excessive and low platelets, it is important to find the cause of the disorder and see why it is causing the platelet abnormality, so that the right medicine can be prescribed to maintain the platelets at (100-300)×10^9/L.