Hard Pea Sized Lump After Rhinoplasty?

It is difficult to assess what is going on without a little more history of the operation and a picture.  You ma have developed a late hematoma or a graft may have moved in the pocket.  Follow up with your surgeon to get this assessed.

The bump above is probably the upper edge of the nasal bone where the osteotomy to reduce the bridge stopped. We often smooth this down after the cut with a rasp, and it may sort out, though let your surgeon have a look.