Platelet 20+ is a severe reduction, indicating a serious condition, because clinically platelet below 30 is prone to spontaneous bleeding, that is, the patient may appear bleeding spots and petechiae on the skin and mucous membrane even in a quiet state, or even bleeding from the nose and gums, vomiting blood, black stool, etc. Therefore, platelet 20+ is a serious condition, which can be caused by a variety of diseases in clinical practice, such as acute aplastic anemia. Patients will have progressive anemia, uncontrollable infections and a severe reduction in platelet count, so platelet 20+ is very serious if it occurs in patients with acute aplastic anemia and requires prompt platelet transfusion therapy. At the same time, immune thrombocytopenia patients with more than 20 platelets also belong to a more serious condition and need to be given glucocorticoid therapy. If hormone therapy is not effective, immunosuppressive therapy can also be applied, such as vincristine, cyclosporine, etc.