Does my Boa have an underbite?

[Salamander Rising]

It almost looks a little swollen right at the lower front. Maybe she is rubbing on something. Have you taken her to a vet?

That's what's weird.

It's not 'swollen'.

She's 4 years old and has always looked like this.

The inside of her mouth couldn't possibly look cleaner or healthier.

She doesn't "rub" and her substrate is dimpled brown shipping paper.

I was thinking more along the lines of an "orthodontic" kinda thing, like Bulldog underbites.