Older people can get leukemia. The incidence of chronic myeloid leukemia increases with age, and the incidence of chronic lymphocytic leukemia peaks in people over 50 years of age, and chemotherapeutic drugs need to be reduced in elderly patients with acute leukemia. Leukemia can occur at all ages, with a peak at 0-4 years of age and another peak after 40 years of age. Relatively speaking, children and young people are more likely to get acute leukemia, and middle-aged and older people are more likely to get chronic leukemia. Acute leukemia progresses rapidly and the natural course of the disease is only a few months without treatment; chronic leukemia progresses relatively slowly and the natural course of the disease is about several years without treatment. Elderly patients with leukemia should be treated as aggressively as possible to prolong their survival if their physical condition permits; if their condition is severe, their physical condition is poor, and they are combined with damage to their organs, then they should consider conservative treatments to alleviate their pain. Leukemia is a malignant disease, if leukemia is suspected, specialist treatment is required as soon as possible.