On a very basic level, dreaming about feeling nauseated or wanting to throw up may very well be simply because you have indigestion and do feel very queasy while you're sleeping. It may be a signal of a host of various conditions including acid reflux, gastroesophageal reflux disease (GERD), anxiety, medication side effects, and peptic ulcers, via Healthline.
Anxiety tends to be worse at night when your body is finally at rest but your mind is still in overdrive. With acid reflux and GERD, laying down can cause reflux to be particularly troublesome since with these conditions acid travels upward to your esophagus. This, in turn, can also affect a peptic ulcer.
Dreaming about vomiting could also be a sign of pregnancy since nausea and vomiting are one of the earliest symptoms of pregnancy. At the same time, pregnancy often causes dreams to be particularly vivid, via Sleep Foundation.
Yet many times, dreaming about throwing up isn't physical at all.
