What is my best option to fix asymmetrical lips due to trauma? (photos)

there are many options for treating lip assymetry and i suggest you get a formal consultaton to determine what is best. Dr. Emer.

Thank you for sharing your question and photographs.  In the hopes of improving your current asymmetry I would advocate for placement of a hyaluronic acid based dermal filler.  This will cause an increase in your overall lip size but will camouflage the raised area of injury.  After 12 months if your left lower lip does not flatten you can consider a procedure to help reduce the area.  Hope this helps.