Radiation for breast cancer is one of the main treatments for this disease, which is used to reduce the size of the tumor and slow its growth. Exposure is the effect of radiation on the body, which can be used to treat breast cancer. Radiation is a source of particles that is produced in special devices or by special sources. Radiation treatment for breast cancer is carried out in several options: Excised cancer. In this case, the tumor is surgically removed, then radiation is given to the breast tissue and lymph nodes. These procedures are carried out until the cancer cells are completely destroyed. After irradiation, several more radiotherapy sessions are performed. Local cancer. This type is often diagnosed after tumor removal. For successful treatment, radiation therapy must be given to cancerous tissue that was not removed. It is also recommended to carry out radioirradiation procedures for the lymph nodes that are located under the arms, above the chest and on the neck. Radiation is also used for recurrent cancer. In the initial stages of the disease, the procedure is aimed at reducing the size of the tumor. In advanced forms, treatment affects regional nodes that are not included in the chest.