Vomiting

Vomiting (or emesis) is the forceful expulsion of the contents of one's stomach through the mouth. Although it probably evolved as a mechanism for expelling ingested poisons, vomiting may result from many causes not related to poisoning, ranging from gastritis to brain tumors, or elevated intracranial pressure (ICP). The feeling that one is about to vomit is called nausea. It usually, but not necessarily, precedes vomiting, nor does it always lead to vomiting. Antiemetics are sometimes necessary to suppress nausea and vomiting.

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The medical branch investigating vomiting, emetics and antiemetics is called emetology.

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Stomach: In anatomy, the stomach (in ancient Greek στόμαχος) is an organ in the alimentary canal used to digest food. Generally, the stomach's primary function is not the absorption of nutrients from digested food; this task is usually performed by the intestine....

Poison: :This article is about the dangerous substance. For the band see Poison....

Gastritis: Gastritis is a medical term for inflammation of the lining of the stomach. It means that white blood cells move into the wall of the stomach as a response to some type of injury. Gastritis does not mean that there is an peptic ulcer or cancer. It is simply inflammation — either acute or chroni...