So I was in a fight and I got punched in the mouth and busted my lip and it was bleeding but it stoped after a couple hours. Then by the time I got home it was a yellow/white bump/swelling on my lip and it looks similar to a canker sore or a cold sore but I'm not sure of it also it doesn't hurt to lick it or lightly touch it but it has a scab starting to form (my hypothesis is that once I got hit in the mouth my lip was stabbed or cut by my tooth because I have other very small/minor canker sores or cuts or whatever that align with some of my other teeth ) pls respond ASAP and thanks for helping