There is a phenomenon that many patients have experienced, when several months or even years after the surgery, the original surgical incision appears red, painful, and even pus discharge, when the hospital examination, the doctor will tell this is the incision rejection reaction, the thread must be removed in order to heal, some patients need to undergo several surgeries, so some patients ask what is this? Is it because the doctor didn’t remove the stitches properly when he removed my stitches? Is the doctor irresponsible? Some people even think it is medical malpractice, but it is not what you think. Our abdominal wall consists of peritoneal layer, abdominal muscle sheath layer, abdominal muscle layer, subcutaneous fat layer and skin, when the doctor sutures the incision layer by layer, the sutures currently used are silk threads, the absorption time often takes 18 years, and the sutures removed by the doctor for you is only the outer skin layer, the inner 3 to 4 layers are unnecessary to remove, the silk threads used now have better compatibility with the human body, that is However, there are very few patients who are immune and whose immune system does not allow foreign objects to remain in the body, and eventually expel the threads from the body, and the above-mentioned situation occurs. In addition, when an infection occurs in the incision, the tip will become a foreign body and cause the wound to not heal, so in these cases, the wound can only heal if the incision tip is completely removed, and in some cases, it takes several surgeries to completely remove it. Can you understand the above?