Lava Damage Description

Just started this game a few days ago and was curious about lava damage. Is it a permanent decrease in HP or is there a way to get it back?

It's just regular damage. You can heal it like you do any other damage (healing spells/potions, resting).

Thanks for the info. I just figured this out last night. I was confused due to the fact that sleeping in an Inn gave me extra HP over my base value that cannot be healed until you sleep in an in again.