The main precautions for breast cancer patients after radiation therapy are as follows: 1. The side effects of radiation therapy for breast cancer, skin reactions may be further aggravated 1-2 weeks after radiation therapy, this situation is caused by the accumulation of radioactivity, at this time, you need to contact with the attending radiotherapist to see if you need to continue treatment; 2. It will be relieved in a short period of time; 3, pay attention to diet and strengthen nutrition, usually last until about 1 month after radiotherapy will slowly improve, such as can not improve need to communicate with the doctor; 4, the end of radiation is not the end of all treatment, some patients also need to endocrine therapy or targeted therapy; 5, need regular follow-up, generally every 3-4 months within two years, every six months within 5 years, after 5 years 1 year follow-up 1 After 5 years, the follow-up will be once a year.