As the name implies, a reduction suture is a suture used to reduce the tension of the incision. It is usually used in patients who are particularly thin and in poor health and suspect that the incision will not heal properly after surgery and that the incision may split; it is also used in patients with incision splitting, incision infection, and secondary surgery after surgery. The difference between a reduction suture and a normal suture is that a reduction suture is usually a full suture or an extraperitoneal suture, which is a suture that closes the skin, subcutaneous and muscular layers. The stitch spacing of the check suture is wider, usually more than 2 cm from the incision, and the hypotonic suture requires a rubber tube, such as a red catheter, to be worn on the surface of the suture. The skin should be protected with a rubber tube because the stitches are routinely removed in 14 days and because the stitches are so strong that the knots may be cut into the skin.