What is a characteristic symptom of a small bowel obstruction?

Vomiting is a characteristic symptom of a small bowel obstruction due to the build-up of intestinal contents that cannot pass through the obstructed area. As the obstruction prevents the food, fluids, and digestive juices from moving forward, the pressure increases in the intestine, leading to nausea and vomiting as the body attempts to relieve this pressure.

In cases of small bowel obstruction, vomiting may also have a feculent odor, indicating that it is coming from a lower point in the gastrointestinal tract. This is a key sign differentiating it from other gastrointestinal issues.

Other symptoms of small bowel obstruction may include abdominal distension and pain. While the other options presented—frequent urination, chest pain, and fatigue—may be associated with various medical conditions, they are not specific indicators of small bowel obstruction and do not typically arise as primary symptoms in this scenario.