Is the rib graft too large and visible? (Photo)

8 months ago I had a rhinoplasty with a solid rib graft. I have developed a bump on the top of the graft which is visible. I thought this would go over time however there has not been any improvement. The bump itself it quite hard and I suspect that it might be the graft which is too big and causing this. What are my options getting this resolved? Will I require a revision rhinoplasty or can this be rasped down?