If a patient’s platelets are reduced to 20×10^9/L, their survival period is related to the cause of platelet reduction and cannot be generalized. Platelets in the blood mainly play a role in repairing broken blood vessels, clotting and hemostasis, and the normal range is (100-300) × 10^9/L. A platelet count below 100 × 10^9/L is considered thrombocytopenia. If platelets are reduced to 20×10^9/L, it will seriously increase the risk of bleeding in patients. Patients with primary thrombocytopenia will generally not affect their survival after treatment with glucocorticoids. If the thrombocytopenia is caused by acute leukemia, the patient’s survival tends to be shorter. If thrombocytopenia is caused by aplastic anemia, patients can delay their survival after treatment, but symptoms such as bleeding from the skin and mucous membranes, hematuria, coughing up blood or intracranial hemorrhage caused by thrombocytopenia may endanger patients’ lives at any time. Patients with thrombocytopenia must promptly visit the hematology department of a regular hospital to have the cause of thrombocytopenia diagnosed by a professional doctor, and at the same time actively cooperate with the doctor’s treatment to prevent the risk of bleeding.