The time to platelet recovery during chemotherapy varies depending on each individual’s condition, physical status, as well as the chemotherapy regimen and number of chemotherapy sessions. It is common for chemotherapy to cause low platelets. Most chemotherapy drugs cause bone marrow suppression, resulting in decreased bone marrow hematopoiesis, which in turn may cause a decrease in the total number of platelets in the patient’s body. Therefore, the time required for platelet recovery is related to the patient’s ability to recover from bone marrow hematopoietic function. When platelets are low during chemotherapy, they can be treated with platelet-raising drugs, such as thrombopoietin, and the platelet count will rise again in about a week; after chemotherapy is over, the inhibitory effect of chemotherapy drugs on bone marrow hematopoietic function will diminish, bone marrow hematopoiesis will start to recover gradually, and the platelet count will slowly return to its previous level. During chemotherapy, it is common for patients to have lower platelet count, so there is no need to worry too much. It is recommended to pay attention to rest, maintain a good state of mind and actively cooperate with doctors.