Constitution measures health, stamina, and vital force.
Constitution Checks
Constitution checks are uncommon. The only skill associated with Constitution is Endurance.
Endurance.Your Constitution (Endurance) checks include things like running, fighting, climbing, or swimming for an extended period of time. Holding your breath is also a Constitution (Endurance) check.
The GM might call for a Constitution check when you try to accomplish tasks like the following:
- Hold your breath
- March or labor for hours without rest
- Go without sleep
- Survive without food or water
- Quaff an entire stein of ale in one go
Hit Points
Your Constitution modifier contributes to your hit points. Typically, you add your Constitution modifier to each Hit Die you roll for your hit points.
If your Constitution modifier changes, your hit point maximum changes as well, as though you had the new modifier from 1st level. For example, if you raise your Constitution score when you reach 4th level and your Constitution modifier increases from +1 to +2, you adjust your hit point maximum as though the modifier had always been +2. So you add 3 hit points for your first three levels, and then roll your hit points for 4th level using your new modifier. Or if you’re 7th level and some effect lowers your Constitution score so as to reduce your Constitution modifier by 1, your hit point maximum is reduced by 7.