You're hit by a weapon with poison.
When you are hit, you make a fortitude save throw, and you fail.
The poison has no onset time, so you immediately enter stage 1, and you take its effects.
If the duration of the stage 1 is 1 round, when do you make the second save?
1. When does it start your turn?
2. When does it end your turn?
3. When is the foe, that hit you, turn?
Might anyone help me?
At the end of your turn.
• If you have a persistent damage condition, you take the damage at this point. You also attempt any saves for your afflictions at this time. Many other conditions change at the end of your turn, such as the frightened condition decreasing in severity.
At the end of your turn.
• If you have a persistent damage condition, you take the damage at this point. You also attempt any saves for your afflictions at this time. Many other conditions change at the end of your turn, such as the frightened condition decreasing in severity.
So, if you receive the attack and fail the save roll entering stage 1, you can, just after the attack (your turn), fail again and enter stage 2 before 1 round has passed, can't you?
Yes, that would be before a full round has passed for the enemy that poisoned you, but you would get a full round of actions before suffering the effect again.
You could use those actions to drink an antidote or cast a spell or whatever to remove your affliction or at least help you with your saving throw. If you want to.
Maybe if you're lucky, some of your allies might have their turns after you got poisoned but before your turn so they could help you too.
Side note: You can't delay your turn to let an ally (e.g. a cleric) cure your affliction before you take effects because the Delay action causes all your persistent damage to occur at the moment you use the Delay action.