Skin infection after radiotherapy for breast cancer, mainly pay attention to skin care, local medication and dietary care. 1. Skin care: skin infection after radiotherapy for breast cancer is mainly due to skin ulceration caused by radiation therapy and improper care, which leads to secondary bacterial infection, pay attention to cleaning the local skin, use iodine povidone to disinfect, keep the skin clean and dry, and reduce the friction and stimulation of the local skin. 2. Local medication: If the skin infection is obvious, after disinfection, antibiotic ointment can be applied locally, such as erythromycin ointment and mupirocin ointment, which have the effect of anti-inflammatory and pain relief. 3. Dietary care: after radiotherapy for breast cancer, you should try to have a light diet, avoid spicy and stimulating food, and eat more food rich in protein and vitamins, which is helpful to your condition. If the skin infection is serious after chemotherapy for breast cancer, you should consult the doctor in time and cooperate with the doctor to take treatment.