Early symptoms of leukemia in children include anemia, fever, bleeding and so on. 1. Anemia: one of the common symptoms of leukemia patients, mainly caused by abnormal function of bone marrow. 2. Fever: more than half of the children will have this symptom, which can be low fever or high fever that does not go away, the reason may be that leukemia itself releases fever-causing factors, or it may be caused by secondary infections, such as pneumonia, oral ulcers and so on. 3. Bleeding: It can be manifested as bleeding from nasal mucosa and gums, or bleeding from skin such as petechiae and ecchymosis. If the patient is a girl, it can also be manifested as excessive menstrual flow. In addition to the above symptoms, children with leukemia in the early stage may also show joint pain, lymph node swelling and other symptoms. If the patient has the above symptoms, it is recommended to consult a doctor as soon as possible to identify the cause of the disease and give regular treatment under the guidance of the doctor.