Sometimes the curve is lost because the surgeon had to make the incision more laterally than we like. Dermabrasion probably won't help and you should wait at least 1 year. Fortunately, you don't walk around with this view showing.
Unfortunately, it is easier to thin the skin than thicken it but different filler materials could be used as well as possibly fat injections. Other material could be implanted surgically like fascia, alloderm, cartilage. I would recommend seeing a plastic surgeon for a further evaluation.
You probably have a deviated septum that was not completely repaired. However, if they made your access incision for the septum on that side, it will be a little thick for the next few months.
Incisions for closed rhinoplasty are also very similar to those made for septal surgery, so it is...
