Nausea is a symptom everyone dreads. You've almost certainly experienced that queasy feeling at one time or another - perhaps while reading a book in a moving vehicle, or maybe after eating something that didn't agree with you.Whatever the cause, "nausea" is a term that describes the uneasy feeling in your stomach that means you might have to vomit. Two of the most common causes of nausea and vomiting are stomach flu (viral gastroenteritis) and food poisoning. A number of 3 medications can also