No, it's nothing like that. It's not painful. More of--a yearning.

Antidotes are quite useful. On my world, there are many monsters that can poison humans.

[She next pulls out two vials: each contains a kind of bright sphere. One of the spheres is purple, and one is golden.] These are potions. You apply them to injured areas to cure them. The purple is for minor wounds, and the gold for more severe injuries. If you have internal injuries, they should be ingested.

If one isn't enough, you apply more potions until you're healed.