Platelets are the blood cells in the body responsible for stopping bleeding. The greatest danger of low platelets is the risk of bleeding, and the lower the platelets, the greater and more serious the risk of bleeding. When the platelet count is greater than 50×10*9/L, the body generally has no obvious spontaneous bleeding and can tolerate general surgery such as tooth extraction, liver puncture, etc. However, if the platelet count is below 50×10*9/L, the body cannot tolerate larger surgical procedures, such as open heart surgery, cesarean section, etc. If the platelet count is below 30×10*9/L, spontaneous bleeding is likely to occur, that is, bleeding occurs without trauma, and the patient shows bleeding spots and petechiae on the skin mucosa, and in severe cases, bleeding from the nose and gums. Therefore, the biggest danger of low platelets is easy bleeding. It is necessary to visit the hematology department in time to identify the cause of thrombocytopenia and give corresponding treatment.