Generally platelets can survive for 7~14 days, the exact time can not be determined clearly. Platelets have the function of promoting hemostasis and coagulation, and a decrease in platelets can cause blood diseases. According to clinical studies, platelets can normally survive for 7 to 14 days in the body, but the exact survival time cannot be accurately determined, and there may be a certain degree of individual variability. Under normal circumstances, the platelet count is about (100-300) × 10⁹/L, and its main physiological function is to promote hemostasis and accelerate coagulation. Therefore, when the platelet count is lower than the normal range, to a certain extent, it is easy to develop blood disorders, which are clinically seen in thrombocytopenic purpura, aplastic anemia and so on, and most of the patients will have symptoms such as hemorrhage, skin petechiae, dizziness, and fatigue. To summarize, if the patient’s platelet count is abnormal, it is necessary to go to the hospital in time and cooperate with the doctor for active treatment.