what would this white thing be?

[sigmatheratops]

My tortoises are healthy in general, but I just recently noticed this little white thing on their face:
(The thing beside his mouth, looks like if he had cloth forced into the side of his mouth)
He has a little bit of loose skin on the other side of his face. When I pulled it down gently, it showed the same thing. My other tortoise is also showing this. Would this be anything to worry about? (I know it looks like skin, but I’m worried because it came out of nowhere)

 

[TammyJ]

Maybe it's the egg tooth?

 

[wellington]

I can see what you are asking about.