Because the tissue is damaged during the plastic surgery, the body will have a process of self-repair to return to normal. In this process, a large number of repair factors gather on the face, causing edema.

Cosmetic surgery, also known as plastic surgery or plastic surgery, mainly covers wounds and diseases such as skin, muscles and bones, as well as defects and deformities of congenital or acquired tissues or organs. Treatment includes repair and reconstruction. Plastic surgery mainly deals with skin, muscle and bone trauma, diseases, congenital or acquired defects and deformities of tissues or organs. Treatment includes repair and reconstruction. Autologous tissue transplantation is performed by surgery, and allogenic tissue or tissue substitutes can also be used to repair tissue defects or deformities caused by various reasons, so as to improve or restore physiological functions and appearance.