Do plastic surgeons photoshop before and after pictures? Would a nose job help me breathe perfectly?

I need to get a septoplasty, and am looking at some before and after pictures of nose surgery. Some of the nose look HUGE and EXTREMELY crooked before....but then perfect afterwards. Also, in every single one of the pictures on some sites the surgeons claim the patients have great breathing. Can nose surgery really do this, like magic? Something seems fish about this, too good to be true. Is it really possible to get a nose job and be able to breathe perfectly after?