The threads of absorbable threads can be cut on the outside, or they do not need to be cut. If the threads of absorbable threads are outside, the exposed area of the threads will not react chemically with the skin or the soft tissues underneath, so they will be absorbed. However, if the root of the thread is gradually absorbed, the thread will fall off on its own, so it is better to cut it off to avoid bacteria from outside invading the subcutaneous tissue through the thread, which may lead to bacteria breeding and reproduction in the subcutaneous tissue, producing toxins and eventually leading to wound infection. If the threads are not cut, the wound must be disinfected, changed and bandaged regularly to avoid infection, and it is okay to wait for the threads to fall off on their own.