Eli5 why do we produce a lot more saliva right before we vomit?

Question

I’m currently suffering with a nasty sickness bug and was wondering why my mouth fills with saliva right before I vomit?

NSFW just incase

In: 3025

Answer 1

Two reasons :

First, as said by others the saliva will protect your mouth and throat from the acidity of what is coming from your stomach.

Second, frequently when we vomit, our body thinks we are closed to be poisoned. So to avoid it it throw away what is in the stomach and the saliva in the mouth could participate to reduce risk of poisoning by diluting what is actually in the mouth.