Infectious diseases are caused by pathogenic pathogens, including viruses and bacteria, that cause illness in susceptible people through daily contact. Leukemia is not an infectious disease because it is not caused by direct contact with pathogens, so it is not an infectious disease. Therefore, it is not a contagious disease. Therefore, there is no need to panic or distance yourself from leukemia patients in your daily life. After suffering from leukemia, patients may experience symptoms such as mouth ulcers, skin lesions, and inflammatory eye lesions. However, because the research on leukoaraiosis is not very clear, the cause and pathogenesis of the disease are still unclear. Leukoaraiosis may be related to genetic factors, such as human leukocyte antigen. In addition, some studies suggest that the onset of leukoaraiosis is related to abnormal immune responses caused by viral or bacterial infections, for example, tuberculosis infection induces immune abnormalities that lead to leukoaraiosis, rather than being caused by direct infection with Mycobacterium tuberculosis. Although leukoaraiosis is not contagious, it can spread to the whole body and cause damage to other organs, so patients need to be actively treated with commonly used drugs, such as colchicine, thalidomide, glucocorticoids, etc. In addition, patients need to be reviewed regularly. In addition, patients need to undergo regular checkups and pay more attention to their own changes in order to avoid recurrence of the disease.