Plastic surgery can help people who have been badly injured regain something like their usual appearance, so that they can continue to live and work happily. Very often, however, people will have cosmetic surgery just to improve their appearance. They may want to change the shape of their noses, or they may want to remove wrinkles from the face, or have their faces "lifted." In such cases, the change is only temporary, and in time, signs of age appear again.