The difference between stitch removal and stitch-free is mainly the following: First, the material of the applied suture is different. If you want to remove the stitches, the application is usually the ordinary silk thread, which is not able to absorb itself. The best absorbable thread is the collagen thread, which can be absorbed inside the body by reacting with the secretions of the body to avoid removal of the thread. Second, the degree of convenience. The actual wound can be changed on a regular basis, and the outside thread or thread can fall off by itself. Third, the reaction of foreign bodies. If the thread is removed there is no foreign body reaction to the thread, if the non-removable thread stays in the subcutaneous tissue part, the absorbable thread may be incompatible with the subcutaneous tissue and foreign body rejection reaction, redness and swelling of the wound, pain, and even oozing, infection, etc.