Thank you for your question and the picture.
Unfortunately, the upper lip has been repaired in a misaligned manner such that the vermillion border (red part of the lip) has not been attached to the adjacent side correctly.
The main thing here is to cut through the existing scar, remove any scar...
I would begin conservatively with application of Plato's Scar Serum, light chemical peels to exfoliate pigmentation, and Melarase to avoid hyperpigmentation. Best, Dr. KaramanoukianLos Angeles
I would suggest an in person consultation with an expert for evaluation. Keloids and hypertrophic scarring should be treated in a combination approach with lasers along with steroid/5fu injections. Best, Dr. Emer.