I had a large scar from childhood, across my wrist. Last year, I was trimming shrubs when I ran into a bee's nest. They swarmed on me and got me good. After a few days, when the swelling went down, the scar had almost disappeared. From being 4" long and probably 3/8" wide, it is barely 1/4 long, and barely wider than a pen line.
I don't recommend this method, but something in that venom works wonders.