Vomiting is the constant symptom of duodenal obstruction. It may be preceded by indigestion and nausea as the stomach attempts

Bowel obstruction requires a surgeon, sometimes immediately.

In adults, the usual cause is a peptic ulcer of such antiquity that repeated cycles of injury and scarring have narrowed the passageway.

Prompt and effective treatment of peptic ulcers will prevent chronic scarring and narrowing.

X rays taken with contrast material in the stomach readily demonstrate the site of the blockage and often the ulcer that caused it. Gastroscopy is another way to evaluate the problem