Recovery time from myelosuppression is usually around 1 to 3 weeks and varies from case to case. Myelosuppression means that the growth of bone marrow cells is affected by some factors, resulting in inhibited growth. 1. Infectious mononucleosis caused by EBV and other infections can cause myelosuppression, and the recovery time of myelosuppression is related to the clearance time of the virus. The self-limiting time of viral infection is usually about 3 weeks, and the myelosuppression can be restored after the virus is cleared. 2. If the myelosuppression is caused by chemotherapy, it is related to the application time and dose of chemotherapy drugs. Myelosuppression is the most common adverse reaction after chemotherapy, and it takes about 1~2 weeks for myelosuppression to recover. The more frequent the chemotherapy, the longer the period of myelosuppression will be. In addition, the myelosuppression period is significantly shorter in younger patients than in older patients due to better bone marrow compensation. Specific diagnosis and treatment should be carried out under the guidance of a physician.