Translations:Utilizando Atributos/140/en

If your Constitution modifier changes, your hit point maximum changes as well, as though you had the new modifier from the 1st level. For example, if you raise your Constitution score when you reach the 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 the 4th level using your new modifier. Or if you’re at the 7th level and some effect lowers your Constitution score to reduce your Constitution modifier by 1, your hit point maximum is reduced by 7.