Nausea is a common symptom of many different conditions. Medical professionals usually associate it with stomach discomfort and the possible urge to vomit. Nausea is not a condition or illness itself.

Nausea and vomiting at night are often related to digestive concerns, like acid reflux or ulcers. But they can also have some unexpected causes, like anxiety. Share on Pinterest Nausea can happen at ...

Morning sickness, involving nausea and vomiting, is very common during pregnancy due to hormonal changes. However, other conditions can cause it as well. Share on Pinterest FG Trade/Getty Images ...