Radiotherapy is widely used in breast cancer. Radiotherapy is a local treatment that irradiates the whole breast, and the reaction of patients after radiotherapy is usually a skin reaction, in which the skin may ooze, which is actually a manifestation of acute radiation dermatitis in breast cancer. This kind of ooze is caused by skin breakdown, and the ooze may cause infection, so it needs to be treated actively. The treatment method is usually to give the patient anti-inflammatory and anti-swelling drugs as local wet compresses, and after the local area is dry, then give the patient drugs to promote radiotherapy repair application. In this way, the combination, insist on giving patients, generally after 2-3 weeks, the skin exudate can disappear, and then the skin will slowly heal.