PHB H i t P o i n t s
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.

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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.


This last part isn't implemented in game or it's bugged. Would be cool if it worked, that is all.

Last edited by Lastman; 19/01/23 10:09 AM.