For the most ideal results, you may need multiple treatment sessions with both steroid injections and a gentle laser to resurface the skin.
You have a hypertrophic scar. Treatment with steroid injections and lasers are the conservative approach and may help to flaten the scar and make it less noticeable. Your best option for closer to a full "cure" would be re-excision of the scar followed by steroid injections and/or laser. There is always a chance of the scar recurring or it worsening, but the more conservative options described above may not help much. Some people have tried microneedling, but it rarely gives a full improvement. Find an expert in the treatment of scars. Best, Dr. Emer.
Based on the pictures, it would seem that is a hypertrophic scar as it does not seem to extend outside the boundaries of an initial injury. It is in a tough spot as it lies at the junction of your nose and cheek which is why you have been getting luke warm confidence from your consultations so far. If you were my patient I would counsel you on what realistic expectations may be and them perform scar excision with Z-plasty to reorient the scar and limit the chances of a similar outcome.
How did you obtain this scar? Was it sutured? I would recommend re excision with layered closure and "microBotox" to wound edges. Fee $2,000...
Kenalog is unlikely to produce much gain. Without an exam, it is impossible to determine whether you have a true keloid or scar hypertrophy. One option is a trial of serial excision of a small portion of the scar followed by steroid treatment. Best of luck.
It looks from the picture like you may have either a keloid or hypertrophic scar--a little difficult to tell without an examination. That being said I usually tell my patients that if it is an early scar a series of Kenalog (steroid) injections may help to flatten the scar but if it is failing that treatment or a well-established scar that excision followed by a Kenalog injections series is best such that you start from a fresh scar. The 1st injection is done at the time of surgery after incision closure and then a series of injections are done post-postoperatively on a monthly basis. This combined with scar massage, silicone ointment/taping, etc is often successful at improving the appearance. The good news is that this is in an ideal position to hide the scar fairly well in a natural skin fold of the cheek-nose junction. This method doesn't guarantee a 0% chance of recurrence of the raised scar but should reduce the risk! Good luck!