The wound after breast cancer surgery can generally resume stitch removal in about 2 weeks, but it usually takes about 1 month for the wound to return to normal. Breast cancer surgery is now mostly radical surgery. Post-operative wound healing, which is the process of repairing damage after skin and other tissues are separated or defective, includes tissue regeneration, granulation and scar formation. The postoperative wound is neat and has few tissue defects. The epidermis covers the wound 1-2 days after surgery, and granulation tissue begins to grow from the base and edges of the wound to fill in the wound on the third day. Collagen fibrous tissue is produced 5-7 days after surgery, followed by 1 week of active collagen fiber formation and gradual recovery thereafter. Therefore, the stitches can be removed 5-7 days after the surgery. The incision is completely healed and a scar is formed in 2-3 weeks. After breast cancer surgery, patients should eat only after the recovery of intestinal function, and start to eat well-digested liquid or semi-liquid food.