Comment by ijustreallyloveyaoi<3 on Jinx - Chapter 10

The cauliflower ears fighters get them from falling into or creating friction with floor a lot. It's usually a build up of fluids in the ear, most MMA fighters get it

omg same the ears looks weird like the about to explode

Every boxer/fighter has those kinda ears. Especially in mma

Like the comments saying here, it's natural for boxers to have ears like that because of the nature of the sport. Google some of them.
I thought it was a great realistic touch as opposed to having them perfect to fit his appearance!

I was wondering too but now i know the answer IM sorry dear author, i have doubted you this whole time because of my lack knowledge.