In 2009, I was mugged in college and hit with a glass bottle on my face. It caused me to lose two teeth, and have a nice 1 inch scar directly on the center of my chin, in the shape of a fish hook. The surgeon at the time stitched up the chin cut bad - it essentially is overlapped by a small margin, causing the scar to have a "lump" or protruding look. I'm at a loss of what type of surgery to get.
The scar is visible because it lies in the middle of an aesthetic unit of the face & is not aligned with any naturally occurring facial skin folds or wrinkles & the tissue to the right of the scar is more prominent. The treatment is to excise the scar with irregular geometric shapes & realign layers deep to the skin to make it less noticeable & the right side less prominent. If you use only one shape such as a triangle the result won't be as good. If you don't realign the deeper layers I don't think you an reduce the prominence.
I hope you realize that this format of posting questions & receiving answers lacks the face to face direct communication required to make an informed decision regarding surgery. My response does not represent formal medical advice or constitute a doctor patient relationship. You need to consult with i.e. personally see a board certified plastic surgeon in order to receive a formal evaluation & develop a doctor patient relationship.
The scar can be revised and improved. Scars are forever.
But it seems you need revision , muscle repair and align the lip margin better and accurately.
Thank you for sharing your question. Best to have a surgical scar revision to better match the skin edges and camouflage a portion of it into natural body creases. Hope this helps.