We're discussing the main risks of rhinoplasty surgery. In general, there are three important risks that we need to discuss: infection, bleeding, and minor contour irregularities. Infection is a possibility anytime surgery is performed.
The nose is not the cleanest part of the body. Therefore, we will often give antibiotics just before a rhinoplasty begins, and for a certain period of time after the rhinoplasty takes place in order to attempt to prevent infection. The face is somewhat privileged in its ability to fight infection because of the robust blood supply. However, infection is definitely a possibility. Going back to the concept of the robust blood supply, this helps with infection and it also leads to a possibility of bleeding. Bleeding is a well-known complication of rhinoplasty surgery- it is possible but it is also rare. In the event that there is bleeding, your surgeon would have to possibly replace the nasal packing that was in the nose initially in order to stop the bleeding.
Finally, minor contour irregularities are possible after a rhinoplasty as well. Rhinoplasty surgery is art and it's also considered to be a millimeter surgery. So, it's possible that there are millimeter differences from one side to another (millimeter asymmetries, millimeter contour irregularities). Often these irregularities aren't noticeable. However, if they are there is the possibility that one would have to go back to the operating room in order to correct them. So, those are three of the possible risks that anyone undergoing a rhinoplasty should be aware of.