Platelets left 30×10^9/L, need to be treated for the cause of the disease. If it is caused by blood system diseases, it needs to be treated for the cause; if it is caused by chemotherapy, platelet supplementation treatment can be carried out; if it is caused by liver diseases, it needs to be actively treated for liver diseases; if it is caused by taking aspirin and other antiplatelet medicines, it can be discontinued first and then be treated. 1. Blood system diseases: including aplastic anemia, leukemia, primary immune thrombocytopenia, etc., need to carry out etiological treatment, such as acute myeloid leukemia patients to be a cytarabine, Zoerythromycin and other drugs. 2. Chemotherapy: If thrombocytopenia is reduced after chemotherapy, platelet-boosting drugs can be taken, such as thrombopoietin, and if the effect of drugs is poor, intravenous platelet therapy can be considered. 3. Liver disease: Thrombocytopenia can also be caused by cirrhosis, etc. Thrombocytopenia is usually related to hypersplenism, and splenic embolization can be carried out at the same time of treating cirrhosis. 4. Antiplatelet drugs: taking drugs that inhibit platelet aggregation may also cause thrombocytopenia, such as aspirin enteric-coated tablets, clopidogrel sulfate tablets, etc., stop using the drug first, and then take platelet-boosting drugs or intravenous platelet therapy. When thrombocytopenia occurs, it should be treated under the guidance of the doctor, pay attention to rest, do not eat too hot food, so as not to damage the mucous membrane of the digestive tract, causing gastrointestinal bleeding, the diet should be diversified, strengthen the nutrition, and enhance the immunity of the body.