There are several possible causes to explain bumps, irregularities or asymmetry following nasal surgery. In your particular situation, I would guess that the bone segments in the region of the right lateral osteotomy are displaced. As discussed below this was either not noted at the time of surgery or shifting occurred shortly afterwards. It is unlikely at 4 weeks following surgery that excessive bone growth (hypertrophic bone formation) or soft tissue scarring are at the root of the problem. See below for a more complete discussion. Up until now, swelling has camouflaged the problem. In all likelihood you will require a revision surgery.
Early in the postop course following rhinoplasty (first 1 to 2 months) the most common causes of bumps, asymmetry or irregularities are:
They were left there during surgery. During the first 2or 3 weeks following rhinoplasty, the swelling camouflages these problems. As the swelling resolves, these issues will start to 'appear' or 'grow' but in fact it is more likely that they have been there from the time surgery was finished.
On occasion, the facial bones or cartilages can shift early on following surgery, but this is usually associated with some form of trauma.
Later on in the postoperative course, generally after 4 to 6months bumps, irregularities or asymmetries can develop as the result of one or more of the following:
Structural instability and collapse of the under supported segments
Cartilage warpage
Bone overgrowth (hyperostosis) or soft tissue scarring.
Mario J. Imola, MD, DDS, FRCSC.