After chemotherapy platelets can not rise may be the disease is not in remission, may also be the bone marrow suppression after chemotherapy. 1. Hematological malignancies require chemotherapy, drugs including cytarabine, Zoerythromycin, etc., some patients after chemotherapy platelets continue to decrease may be chemotherapy is ineffective, the disease is not in remission caused by this part of the patient often need to be the second induction chemotherapy. 2. There are also some patients after chemotherapy myelosuppression for a long time, patients continue to platelet reduction, this part of the patient needs to wait patiently. Regardless of the cause of platelet reduction after chemotherapy, if the degree of severity, bleeding risk or already have bleeding exists, need to be actively under the guidance of the physician transfusion of platelets to support the treatment, to avoid serious bleeding events, such as cerebral hemorrhage, organ hemorrhage. Medication use needs to be under physician supervision.