Peptic ulcer disease are painful sores in the lining of the stomach or first part of the small intestine, called the duodenum. One of the causes of Peptic Ulcer Disease is a bacteria called Helicobacter pylori (H. pylori) that can cause a stomach infection and inflammation. Find more about Peptic Ulcer Disease on http://blog.drsundardas.com/healing-ulcerative-colitis-naturally/