Ulcers are cause by acid eating away at the stomach lining. When the body is in a prone position, digestive acids leak out of the stomach, back into the duodenum. This acid will eventually cause duodenal ulcers.Originally Posted by journyman161
BTW, this was explained to us by a doctor as a possible explaination as to why my sister and I both had ulcers as young teen-agers. Eating late at night was not our habit. Our ulcers were stress induced.
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