Constitution represents a character’s physical durability, health, and wellbeing. Characters with high Constitution are tough, able to travel long distances without becoming fatigued, and more able to with stand damage.
There are no skills tied to Constitution.
Constitution in Combat
Players add their Constitution modifier to their hit points for every character level. Characters with more Constitution will have more hit points, making them more able to withstand damage.
Fortitude saves are rolled to avoid effects like disease, poison, and many spells which harm you physically.