Mammary tumors are breast tumors, which are not caused by viruses and are caused by abnormal proliferation of breast cells. The cause of breast tumors is still unclear, usually clinically believed to be related to hormones in the body. Breast tumor is usually divided into malignant and benign tumors, which is a kind of lesion formed due to the abnormal reproduction and growth of tissue cells, and this kind of lesion usually has nothing to do with viral infection, so breast tumor does not belong to virus. If a patient has a malignant breast tumor, the lesion should be removed in a timely manner, and the wound should be well cared for after surgery to avoid infection and inflammation. For benign tumors without symptoms, patients should follow the doctor’s instructions for regular checkups; if benign tumors grow faster, the tumor should be removed by surgery. Breast tumors should follow the principle of early detection and early treatment, and should be diagnosed and treated in time.