Hi Sana...Scarring after brachioplasty is often quite dramatic and long lasting. That said, your scars may be in the early phases of hypertrophy. I certainly think close consultation with your surgeon is warranted. Treatment modalities at this point include use of scar creams, silicone sheets (or products like Embrace), compression garments, steroid injection or simple observation. I wish you the best!
Yes, the scar does appear to be hypertrophic; relatively raised/red compared to most scars at this stage after arm lifting surgery. Your plastic surgeon will likely have treatment options available to you; sometimes, use of intralesional steroid injection and/or silicone sheeting may be helpful. Best wishes.