There is no definite time for how long it takes for leukemia not to relapse after cure, as long as tiny lesions still exist in the patient’s body, then relapse is possible at any time. 1. Generally speaking, after standardized treatment (cytarabine, Zoerythromycin, etc.), if the patient does not have a relapse after 3~5 years, then it means that the condition has basically been alleviated. 2. However, if the patient often overeats or stays up late at night, then there is still a possibility of relapse, because there are many types of leukemia, of which the main ones that can achieve a clinical cure are acute promyelocytic leukemia and low-risk acute lymphoblastic leukemia in children. In contrast, for other types of leukemia, even if the disease is in remission for the first 3-5 years, some patients may relapse and develop symptoms such as anemia, infection and bleeding. The main reason for relapse is that leukemia cells become resistant to chemotherapy drugs or develop new gene mutations during treatment, resulting in tiny foci remaining in the body and causing relapse after several years. Therefore, patients should do a good job of nursing in normal times, maintain a healthy diet and lifestyle, focus on light food, rest more, avoid overwork, and reduce the chances of disease recurrence. Specific diagnosis and treatment under the guidance of a physician.