Shoulder pain after one month of routine surgery for breast nodules may be normal, or it may be due to postoperative infection, etc., and the cause of the pain should be identified through timely consultation. 1. Normal phenomenon: the cause of breast nodules and ionizing radiation, hormone level abnormalities related to the local mass, and accompanied by pain and nipple overflow phenomenon, so the treatment needs to be surgically removed, then breast nodule surgery will leave wounds on the skin, wounds will be pain, this is a normal phenomenon. 2. Postoperative infection: After breast nodule surgery, improper wound care will easily lead to wound infection, and the wound area will have pain, inflammation and other undesirable symptoms, you can use iodine povidone to disinfect the wound, use sterile gauze to dress it, change the medicine regularly, and take anti-inflammatory drugs orally to treat it. As this symptom alone can not judge the disease, and do not rule out other factors caused by. It is recommended that the patient consult a doctor in time to clarify the cause of the disease and give targeted treatment.