There was a lump like that under my chin, but when I touched it, it was very round and painful. After about a month, it got smaller and the pain was less than the first time (it has been like that since right after the surgery). I guess this isn't a big deal or anything, right?... That's Biobond. ? ㅜ It hurts, but since it's local, it's hard to go right away, so I asked here...