People don't know much about freehand plastic surgery When they first hear this word, they will automatically bring in the basic definition of "plastic surgery": the treatment scope of plastic surgery mainly covers wounds such as skin, muscles and bones, diseases, defects and deformities of congenital or acquired tissues or organs. Treatment includes repair and reconstruction. Autotransplantation of various tissues can be performed through surgery, and allogenic tissues or tissue substitutes can be used to repair tissue defects or deformities caused by various reasons, so as to improve or restore physiological functions and appearance.