There are various causes of low platelet, and appropriate treatment programs should be chosen according to the specific conditions of patients. Patients with idiopathic thrombocytopenic purpura can be relieved by hormone injections, immunosuppressants, etc. Thrombocytopenia caused by malignant tumors needs to be treated for the primary disease, and thrombocytopenia caused by autoimmune diseases can be treated by immunosuppression. 1. idiopathic thrombocytopenic purpura: because platelets are damaged and accompanied by megakaryocyte maturation disorders resulting in bleeding disorders, clinically used hormones (prednisone), gammaglobulin and other drugs to alleviate the condition. 2. malignant tumor: because the tumor invades the bone marrow, which will lead to the reduction of platelet production, and it is necessary to treat the primary tumor disease, such as lung cancer to be pemetrexed and other anti-tumor therapy. 3. Autoimmune disease: for example, systemic lupus erythematosus will affect the bone marrow, resulting in decreased hematopoiesis and decreased platelet production. This is treated with immunosuppressants such as cyclosporine and hormones (prednisone). 4. Aplastic anemia: cyclosporine and other drugs can be used to improve the hematopoietic microenvironment of the bone marrow. 5. Leukemia and other malignant hematologic diseases: can be given to cytarabine, Zoerythromycin and other programs of chemotherapy, when the disease reaches remission, platelets can be gradually restored. Low platelets may require symptomatic treatment with platelet transfusion in addition to the treatment of the cause. If thrombocytopenia is found in the examination, appropriate treatment plan should be formulated under the guidance of doctor and actively cooperate with the treatment.