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

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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

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Anonymous 0 Comments

Does everyone experience this? My experience has always been the opposite. I’ll kneel by the toilet for like 10 minutes, trying to vomit until it eventually comes. And my mouth is always bone dry. Sometimes I’ll sip some water to help the vomit finally trigger. And once it’s done, I’ll wash my mouth out right away.

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