Nausea (Latin: Nausea, Greek: Ναυτεία, "sea-sickness") is the sensation of unease and discomfort in the stomach with an urge to vomit. Causes Nausea isn't a sickness, but rather a symptom of several conditions, many of which are not related to the stomach. Nausea is often indicative of an underlying condition elsewhere in the body. Travel sickness, which is due to confusion between perceived movement and actual movement, is an example. The sense… (More on Nausea)