The treatments for cold during radiotherapy for breast cancer are as follows:1. Cold during radiotherapy must be treated as early as possible, and traditional Chinese medicine or western medicine can be used, but try to avoid the use of drugs that have effect on white blood cells, especially do not abuse anti-inflammatory drugs because antibiotics have effect on white blood cells; 2. Drink plenty of fluids, and traditional Chinese medicine has a very good effect on the treatment of cold during radiotherapy. 3. Ask the patient whether there is fever, sore throat, cough, sweating, cough with or without phlegm, yellow or white phlegm, and urine and stool, after four diagnosis for identification and treatment of Chinese medicine prescription, such as ephedra soup, gui zhi soup, plus or minus Weiweiwei soup and so on. If the symptoms are not serious, radiotherapy can be continued; 4. If breast cancer patients catch cold during radiotherapy, and the white blood cells are elevated or lowered, then it is necessary to combine with chest CT examination to exclude the infection, and it is necessary to use antibiotics reasonably under the guidance of doctors. If radiotherapy is combined with radiation pneumonitis, combined glucocorticoid treatment should be given at the same time, and then radiotherapy should be suspended. Radiotherapy is widely used in clinic as an important means of treating tumors and other diseases. However, since radiation causes bone marrow suppression, patients are prone to catching colds. Cold will not only aggravate the pain of patients, but also lead to serious lung infections and jeopardize their lives if the cold develops further. Therefore, once a breast cancer patient develops a cold during radiotherapy, he/she must pay great attention to it.