Located on the left side of the abdomen is the sac like organ called the stomach. It is connected to the end of the Esophagus tube and joins the mouth to the stomach. A sphincter type muscle separates the esophagus from the stomach. Food passes from the stomach sac into the first part of the small intestine, called the Duodenum, through a valve called the Pyloric valve.
Acids are produced through out the digestive tract, which enables the digestion of food. There are several glands in the stomach producing acid and enzymes. The stomach and the duodenum also produce a mucous which protects these organs from the effects of the acids. In the case of a peptic ulcer, the acids have broken down the lining of the stomach or duodenum. The high acidity of the stomach is caused by drugs, bacteria and other stimulating elements that break and damage the lining of the stomach.
An ulcer can develop anywhere in the digestive system including the esophagus, duodenum or intestines. Duodenal ulcers are more common in men whereas women are more prone to stomach ulcers.
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