What is the inflammation of the stomach and small intestine called?

The inflammation of the stomach and small intestine is referred to as gastroenteritis. This condition typically involves the irritation and inflammation of both the stomach lining and the intestinal lining, often caused by infections from viruses, bacteria, or parasites, as well as by certain toxins or medications. Gastroenteritis commonly leads to symptoms such as diarrhea, vomiting, abdominal cramps, and dehydration, highlighting its impact on the digestive tract.

In contrast, the other terms are more specific: colitis refers to inflammation of the colon (large intestine), gastritis refers specifically to inflammation of the stomach lining, and gastroesophageal reflux refers to the backward flow of stomach contents into the esophagus, not necessarily inflammation. Therefore, gastroenteritis accurately encompasses the inflammation affecting both the stomach and small intestine, making it the correct choice.