How Soon Should a Steroid Be Used on a Nose Callus?

I recently had my cast removed to see a very prominent bump on the left side of my bridge, almost as if my previous hump had displaced itself there. My doctor informed me on the spot that it was a callus formation on the bone, and that I should massage it every day until our 2 week follow-up, at which point he will use a steroid injection to break up the callus.

Is this too soon? Also, it feels like a hard bone. Could it be and if so, is steroid or filing (surgery) better, and how soon? Thank you.