The right to refuse to have surgery depends on you. However, not having surgery might lead to severe complications if you have a certain illness, which may be life-threatening or fatal. This is because surgery may be necessary for a variety of reasons, including the establishment or confirmation of a diagnosis, the removal of a growth or obstruction, the repair or realignment of tissues or organs, the implantation of devices, the rerouting of blood vessels, or the transplantation of tissues or organs. Some individuals choose surgery for cosmetic purposes.