The initial symptoms of juvenile leukemia are fever, anemia, bleeding, lymphatic swelling and so on. 1. Fever: Teenage leukemia is prone to fever due to low immunity which can easily lead to infections and so on. 2. Anemia: because leukemia patients will cause a decrease in the production of normal cells, which will cause anemia for a long time, i.e., pale and weak. 3. Bleeding: leukemia patients will be accompanied by thrombocytopenia, the lower the number of platelets, the greater the risk of bleeding. It is mainly manifested as skin petechiae, ecchymosis, bleeding in the mouth, gums, nose and other parts of the body. 4. Enlarged lymph nodes: leukemia patients will cause abnormalities in the lymphatic system and infiltration. Therefore, some adolescents with leukemia will also have this symptom in the early stage. If patients have the above symptoms, they should go to the hospital in time to find out the cause of the disease and carry out targeted treatment under the guidance of physicians.