Pregnant women can be touched during breast cancer radiotherapy in the absence of radiation. Radiotherapy for breast cancer belongs to physical therapy, which refers to the treatment means of killing cancer cells by using the energy of radiation, generally including preoperative radiotherapy and postoperative radiotherapy. Preoperative radiotherapy can reduce the stage of tumor and the difficulty of surgery; postoperative radiotherapy can effectively reduce the recurrence rate. This type of radiotherapy only has radiation when it is irradiated by radiation, i.e. treatment, and the radiation will disappear when the radiation stops irradiating, and the patients themselves will not be radioactive and will not affect anyone. During the radiotherapy period, you should keep your mood happy, wear loose and breathable clothes, keep your skin clean to reduce the reaction of radiotherapy on the skin, and consult a doctor if you feel unwell.