Late removal of stitches for one or two days after surgery generally has little effect, but if the stitches are not removed for a long time there may be a foreign body reaction, abnormal scar proliferation, affecting the normal healing, etc. After surgery, patients need to standardize the care, and regularly remove the stitches, to ensure that the healing is good. 1. Foreign body reaction: at the early stage of the wound, the suture can play a role in tightening the wound, which is conducive to the growth of the wound. When the wound is healing well, if the suture is not removed in time, the suture will turn into a foreign body, which will cause rejection, and there will be local redness, swelling, infection and other symptoms of risk. 2. Abnormal scar proliferation: Due to prolonged non-removal of stitches, the wound has healed but the stitches are still tightening the wound, the stitches will affect the normal growth direction of the cell tissues, and there may be scars around the stitches to form centipede-like scars, which will affect the aesthetics. 3. Impact on normal healing: prolonged non-removal of stitches may cause bacterial growth and other infections, as well as foreign body reaction, etc. will lead to the wound can not heal normally, is not conducive to the recovery of the wound. After surgery, patients need to go to the hospital in a timely manner to remove the stitches, to avoid the above adverse reactions, and at the same time need to standardize the care of the wound, if there is a local aggravation of the symptoms of the patient need to consult a doctor in a timely manner.