Guidelines on cosmetic surgery: if it is for the purpose of beautification and to increase beauty, then it is haraam, but if it is to remove a fault or deformity, then it is permissible. 

See the answer to question number 47694, in which we said: 

If there is a fault or deformity in the nose, and the aim of the surgery is to remove this fault, then there is nothing wrong with it. 

But if the aim is to increase beauty, it is not permissible to do the surgery. 

It says in Fataawa al-Lajnah al-Daa’imah (25/59): One of my friends has gotten married with Allaah's help, to Him be praise, but he came to me and said:

My wife wants to have cosmetic surgery on her face and chest, because her nose is large and wide and she wants to reduce it by the easy means that have been developed in modern medicine. I told him that there is some doubt as to whether this surgery is permissible. So I am sending this letter with this question: is there any doubt or sin involved in this surgery that my friend's wife is going to do? Please note that the surgery is changing the creation of Allaah and that not doing it may lead to psychological distress because this fault is prominent in her face. 

Answer: if this situation is as described, and there is the hope that the surgery will be successful and will not lead to any greater or equal harm, it is permissible to do it in order to achieve interest sought, otherwise it is not permissible. 

And Allaah is the source of strength. May Allaah send blessings and peace upon our Prophet Muhammad and his family and companions. 

And Allaah knows best.