Exposure to sticky balls does not necessarily cause leukemia, but long-term exposure may increase the risk of developing leukemia. Sticky balls are made of a combination of adhesive and film, which contain more substances such as formaldehyde, and may increase the risk of cancer or leukemia if exposed for a long period of time. In addition, leukemia is a kind of hematopoietic stem cell malignant tumor, which is generally related to biological factors, physical factors, chemical factors and so on. 1. Biological factors: including viral infection and abnormal immune function, such as adult T-cell leukemia, lymphoma can be caused by human T-lymphotropic virus type I. 2. Physical factors: including X-rays, Y-rays and other ionizing radiation can inhibit bone marrow, leading to leukemia. 3. Chemical factors: long-term exposure to chemicals such as benzene and formaldehyde may also increase the risk of leukemia. It is recommended that you should not play with sticky balls for too long, and consult a hematologist for specific knowledge.