The subcutaneous absorbable suture does not need to be removed. Buried in subcutaneous tissue, it only takes time to absorb it slowly. However, it is not recommended to use absorbable suture for cortical suture in special parts with high cosmetic effect. The reason is that the suture stays in the human body for a long time, and the human body may produce instinctive rejection, which will stimulate scar hyperplasia. Non-absorbable sutures in the skin layer need to be removed. Plastic surgeons like to use very thin stitches, such as 7-0 and 8-0 stitches, to make the wound more beautiful. Even if such stitches are smaller than hair, they still need to be removed.