What procedure can fix knuckling after rhinoplasty? (Photo)

I had my septorhinoplasty March 7, putting me just past 6 months. I've recently noticed a hard bump on the left side of my tip. Swelling has gone down, and now i can see it. I saw my surgeon about this and he said he could do a procedure to shave it down after the 1 year mark. I was very nervous and emotional during the appointment, so I didn't ask a lot of questions. Could you please describe this procedure, and what all is associated? What are the risks? Is it fairly easy? Thank you so much!