i had surgery. i had cut out a huge portion of my left bottom lip to test it. it worked. but it took a year to settle and completely cured. it was worse for the initial few months after. my cautious. test it out first like me as everyone is different.
note that i didnt do the same as the others who commented. i saw a plastic surgeon who offered that procedure but i refused. it was too risky. i went to an oral surgeon who performed a biopsy and at the same time she cut out a larger portion than necessary and cut deep down into the tissue because lips do not scare like other body tissue. she prob went down a centimeter then stitched it up.