Is it usually the case that patients are charged for revisions?

I had a rhinoplasty almost 6 months ago and although my surgeon was brilliant, I still find myself slightly unhappy with the result. It isn't symetrical and has very noticable (to me anyway) bumps on one side. My surgeon has said there is nothing he can do until it gets to a year. I think would be willing to discuss a revision operation but am slightly concerned I will have to pay more money for this. I really need reassurance.