I was one who got EC from biting my lips. Looking back at it, I feel so stupid, I must have traumatized them so much. I bit them almost everyday. All I knew was I had to make it smooth. For people who never bit their lips, where does the peeling "cut off" and does that same area stay the same. For example, I'm pretty sure the area that I have EC was because when I first ripped the skin, that is the exact shape of it. I made a quick pic to show what I mean:
The bright red part is the infected area. And only that EXACT area peels everytime. It cuts off at that part. So I wonder how it works for people who didn't peel or bite their lips.