A member asked:

What happens in the body that causes nausea? are nerves involved, or hormones involved, or both?

A doctor has provided 1 answer

Both: Various blood borne hormones (or medications/drugs) cause a signal within the area postrema, which is a region in the brain located on the floor of the fourth ventricle -- outside of the blood-brain barrier. This means hormones cause the brain to release a neurotransmitter that causes nerves to trigger nausea.

Answered 6/13/2018

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