Bump on incision site after otoplasty? 1 week post op. (photo)

Based on your photos, that appears to be a bit of swollen tissue from recent surgery and nearby stitches.  Your sutures are the type that will be removed and after that you can begin some massage to the scar to help it soften and settle.  A scar gel like Stratacel can also be helpful for scar healing and accelerating the maturation process.  Scars look better at 6 months than they do at 6 days.  I anticipate yours will improve with time.  Best of luck in your healing process.