Have you ever researched nasal vestibulitis. That's an infection I think stems from infected hair follicules. I saw it shows being caused by picking, blowing the nose but I bet there's a ton of people that get it and it has nothing to do with it. Are the scabs strictly inside or do some sores extend out of the nostrils? I had one that was one big sore from inside my nose to right under it. First time I got a nose infection the doctors said it was from sniffing drugs hahaha. So you see nothing is absolute. Don't worry about the cause unless you have an ass of a doctor and in that case take your business elsewhere.