Is there a type of rhinoplasty to just fix a bump on the bridge of nose? is it also true best results are achieved in not one but two surgeries? why?

Rhinoplasty: A reduction rhinoplasty can help with the bump but often other maneuvers are required to ensure long lasting function and cosmesis. In rhinoplasty two procedures are not always better than one. Have your nose evaluated by a board certified facial plastic surgeon.

Yes and no: yes just a bump can be removed in rhinoplasty, and most take only one surgery.

Rhinoplasty for Bump: Typically only one surgery is needed for most rhinoplasty. The most common reason is to reduce the bump, "dorsal hump" on the nose. A board certified plastic or facial plastic surgeon should be consulted.

Yes: Yes, rhinoplasty for nasal hump removal is very common. To ensure that you only need one procedure (most common occurance), see board certified facial plastic surgeon.