Originally posted by Charlie:

Originally posted by SiEgE:

Eeeeh.. Super wide question. Please elaborate.

1. Lags. The poisonous NPC bites you, but you don't see it because of lags
2. You're being bitten by leeches
3. You're being "spit at" by a Graydwarf Shaman
4. You're standing near a wild beehive.
5. If you're at someone's server, and you're alone at your base, near a campfire, and keep getting poisoned, I'd say someone is fooling around with console commands/hacks/mods.

im in a private world crafting and im randomly getting poisoned in my house, it happens everywhere but mostly in my house

That is rather intricate.
Few questions and tests to do:
1. Have you, by any chance, built your base inside/in place of a previously existed, abandoned house?
2. Is the poisoning localized? Can you find out the exact spot you're getting poisoned at, the most? Which area? Is the area moving? Does it move towards you if you wait for a bit outside it?
3. Is it limited to being inside/outside?

I have a suspicion there is an underground beehive.