I had a rhinoplasty to correct some internal damage that was affecting my breathing. You will be sore for a day - few days depending on you (healing), your doctor (skill), and your pain tolerance. You will have cotton swabs etc stuffed up your nose, and you won't be going out for any big nights for a few days.
Was it worth it? I can breath much better, and I have to say I also keep my hands up more often when training Muay Thai now.