It is not common on part of the nasal cartilages to start growing after 2 years of a rhinoplasty! If your nose is misshapen and there is prominent growth of cartilage then a cartilage excision followed by a biopsy
is recommended but again, this is extremely unusual. However, in any event you would need to go in for a secondary rhinoplasty to correct any deformity
which you have at present.