Gastroenteritis is the inflammation of the lining of the stomach and intestines, typically resulting in symptoms such as diarrhea, abdominal cramping, and vomiting. The condition is most commonly caused by infectious agents, including various types of viruses, bacteria, and parasites, although ingestion of bacterial toxins can also trigger an episode. These infections disrupt the normal gastrointestinal mucosal barrier and alter the absorption and motility processes within the gut. Treatment generally focuses on managing symptoms and preventing dehydration, often involving the careful rehydration of the patient and, in certain cases, the administration of anti-diarrheal or supportive care measures until the causative agent is eliminated from the body.