Ulcers, previously thought to be caused by stress, are in fact often caused by

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Ulcers are often caused by the bacterium Helicobacter pylori, which can infect the lining of the stomach or small intestine and cause inflammation and damage, leading to ulcer formation. Stress can exacerbate the symptoms of ulcers, but it is not a direct cause. Insufficient diet, genetic mutation, pathogenic normal microbiota, and viral infections are not common causes of ulcers.

Ulcers, Previously Thought to Be Caused by Stress, Are in Fact