Vomiting is the involuntary expulsion of gastric contents through the mouth, often triggered by stimuli such as nausea, gastrointestinal irritation, or central nervous system disturbances. It is clinically significant as it can lead to dehydration, electrolyte imbalances, and aspiration pneumonia, particularly in vulnerable populations. A common association is gastroenteritis, where vomiting serves as a protective mechanism against ingested toxins or pathogens.
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