How risky is a revision at 6 months post op from an initial rhinoplasty?

Hi Doctors, I'm unhappy with the result of my revision rhinoplasty -- the grafts that were put into the nose made it very large. I'm 6 months post op and my doctor is willing to operate now for another revision. I know the general consensus is to wait a year, but how risky is it to undergo surgery now? Thanks in advance!