Bruising and pain at incision site 9 nine months post-op butt implants - what should I do?

I had butt implants 350cc placed under the muscle nine months ago by another surgeon in LA. My left side healed perfectly while my right side has gone through periods of feeling more full and red bruising by incision site. This side is also painful to sit down on because I can feel the implant most of the time. I’ve gotten a cat scan to rule out fluid collection. My doctor said it could be a flare up but lately it’s been constant. what should I do and what do you think it is?