It may not be the best naming convention, but this was what the variables are called. Here's a bit more info
Current Health = if reaches 0, character is dead. Is restored after battle
Current Max HP = maximum HP the character can currently have. Is Max HP - Max HP Penalty (which is increased as you take damage and reduced by resting)
Max HP = The theoretical maximum HP the character can have, determined by toughness, level, and perks.