Reference: al-Muntaqaa min Fataawa Shaykh Saalih al-Fowzaan – Volume 5, Page 338, Fatwa No.455
Question: What is the ruling regarding undergoing plastic surgery?
Response: Plastic surgery as applied in [the field of] medicine is divided into two categories:
One of them [is that which] is [seeking to] beautify [oneself] by removing a defect which a person incurs as a result of an accident or other than that, wherein there is no [legal] harm (prohibition) in [doing so] because the Prophet (sal-Allaahu ‘alyhi wa sallam) permitted a man whose nose was cut off during battle [to replace his nose, but] not to take on a [replacement] nose [made] from gold. [Refer to the hadeeth of ‘Urfujah bin As’ad (radhi-yAllaahu anhu) in the Sunan of Abu Daawood, at-Tirmidhee and an-Nasaa.ee]