Platelets of only 8 x 10^9/L are very dangerous and require hospitalization as soon as possible for platelet transfusion and treatment of the primary disease. Only by correcting the platelet level quickly can the probability of bleeding occurring be reduced. The normal value of platelets is (100~300)×10^9/L. Platelets mainly play the function of hemostasis, low platelets will have the possibility of spontaneous bleeding, mild subcutaneous bleeding, that is, skin purpura or bleeding gums, nosebleeds, and severe can lead to internal bleeding, which can be life-threatening. Platelets below 20*10^9/L carry the risk of spontaneous bleeding and require a platelet transfusion to quickly correct the platelet level. In addition, etiological treatment is also very important, it is recommended that patients go to the hospital in a timely manner, improve the relevant examinations such as bone marrow aspiration, etc., to identify the cause of the disease, and actively treat the primary disease, such as primary immune thrombocytopenia to be oral prednisone, etc. The specific treatment should be directed by a physician. Specific treatment should be carried out under the guidance of physicians.