An ulcer is essentially an open sore that is found on the mucous layer (inner lining) of the organs in the body. The mucous layer protects the organ or gland. Also known as a peptic ulcer, duodenal ulcers cause the deterioration of the lining of the stomach or duodenum. The duodenum is the first section of the small intestine). The symptoms and complications will depend on the size of the ulcer. Smaller ones generally do not cause problems, however larger ulcers can cause bleeding. Ulcers are usually found on the first layer of this inner lining.
Factors that can contribute to the development of these ulcers include: