Immunocompromised may get cancer. In medicine, cancer refers to malignant tumors originating from epithelial tissues and belongs to the most common category of malignant tumors. If the body itself is immunocompromised, it may be infected by other pathogens, which may promote the development of cancer. Once the immune system is out of balance, it will weaken the ability to defend against tumor cells and pathogens, and the abnormal cells produced in the body will escape the surveillance and attack of the immune system, divide and proliferate in the body, which may increase the chance of cancerous cells in the body. If coupled with external factors, such as environmental stimuli, stress, life habits and other stimuli, after decades of development, cancer may be formed. If the body’s immunity is low, it is recommended to take protective measures and enter the hospital in time to avoid critical situations.