Recurrent colds and coughs in children are not necessarily a precursor to leukemia. Recurrent colds and coughs can be caused by viral, bacterial, mycoplasma, tuberculosis and other pathogenic infections, as well as by allergies and lowered immunity. Therefore, it is necessary to combine other symptoms and go to the hospital for relevant tests to determine whether it is leukemia. Children with leukemia are prone to recurrent fevers due to low immunity and abnormal white blood cells, and the clinical symptoms are often similar to those of a cold. However, in addition to these infections, children with leukemia also have bleeding and anemia, such as bleeding from the nose, gums, digestive tract, and pallor. In addition, the infiltration of leukemia cells can easily lead to bone and joint pain and chest bone pressure and other obvious symptoms. Therefore, if a child suffers from recurrent colds and fevers, accompanied by the above symptoms at the same time, he should be highly vigilant and go to the hematology department of the hospital in time to improve the relevant examinations, such as bone marrow aspiration and blood tests to further clarify the cause of the disease.