Postoperative pain management, wound management, care and protection of the affected limb, and rehabilitation such as functional training of the affected limb are feasible after sentinel lymph node biopsy for breast cancer. Sentinel lymph node biopsy for breast cancer may involve total or breast-conserving mastectomy, wounds of the sentinel lymph nodes, and may have complications such as postoperative pain, wound infection or scar tightening, edema of the affected limb, and dysfunction. For postoperative pain of breast cancer, a quiet environment, suitable light, temperature, humidity, etc. should be maintained, and painkillers such as ibuprofen should be taken for pain relief if the pain is more severe. Surgical wounds should be changed regularly, and when there is fluid accumulation, it should be extracted and bandaged with pressure in time, and if there is wound infection, antibiotics should be applied to fight infection in time. The affected limb should be elevated and tucked in after the operation, and the functional exercise can be started from the wrist one day after the operation, and the functional exercise should last for at least half a year. In normal times, the patient should often carry out centripetal massage to avoid pressure on the affected limb, excessive weight bearing, prolonged prolonged sagging, etc. to reduce the occurrence of edema of the affected limb. It is recommended that the patient communicate with the attending physician and follow the postoperative health education for rehabilitation to minimize the occurrence of complications.