You need a formal consultation to determine if the scar is causing the lip asymmetry and what options, surgical vs nonsurgical, are available. I wish you the best of luck, Dr. Emer.
Treatment of lower lip scar
This looks like it was a pretty severe injury. I cannot tell if your causing your lip to protrude in the second photo or not. However, it does look like the injury has created a fair amount of asymmetry. A consultation would be required to determine exactly what needs to be performed but cysts or bulky scar tissue following lip injuries can usually be significantly improved in the office under local anesthesia. I hope this information is helpful.
Stephen Weber MD, FACS
Denver Facial Plastic Surgeon