Leukemia blood transfusion may show improvement of uncomfortable symptoms or adverse reactions, such as improvement of malaise, correction of anemia and bleeding, as well as occurrence of fever, sweating, nausea, vomiting, headache, allergic reactions, etc. 1. Improved reaction or symptom relief: Component blood transfusion can effectively correct the symptoms of anemia and bleeding in leukemia patients, and in most cases, different degrees of improvement and symptom relief can occur after blood transfusion. For example, the symptoms of generalized fatigue can be significantly improved after transfusion of concentrated red blood cells; severe thrombocytopenia can reduce the risk of organ hemorrhage after giving platelet transfusion. 2. Adverse reactions: patients given blood transfusion treatment may also have fever, sweating, nausea, vomiting, headache and other symptoms, and some patients may also have allergic reactions after blood transfusion. Other reactions may also occur after blood transfusion for leukemia, which need to be closely observed and reported to the doctor immediately when discomfort occurs. The specific transfusion process and treatment should be carried out under the guidance of physicians.