There is no explicit directive of the Sharī`ah which forbids plastic
or cosmetic surgery done merely for the purpose of facial uplift. Therefore, we
have no right to forbid what Allah and His Prophet (sws) have not forbidden.
At best, it can be said that the taste which generally develops in a person
when he follows Islam both in letter and in spirit is that he begins to dislike
doing things which are artificial in nature. He begins to thank Allah for what
he has been blessed with and does not complain on what he does not have.
Cosmetic surgery done to restore a person’s looks after an accident or some
other mishap is of course a totally different case and should be considered more
of a medical treatment than a beauty treatment. As such, I think you gave a
sound piece of advice to your friend.