Peptic Ulcers does not Spread , it actually occurs when we are suffering from acidity - related pain in stomach. It is painful  and HELICOBACTER PYLORI is the micro-organism which is responsible for this disease.
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Means of spreading of peptic ulcers 
peptic ulcers occur when acid in the digestive tract eats away at the inner surface of the esophagus, stomach or small intestine . the acid can create a pain. anyone who uses NSAIDs regular is at risk for gastrointestinal problems
although stress is no longre considered to be a cause of uclers , some studies still suggest that stress may predispose a person to ulcers or prevent existing ulcers from healing 
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