Crepe dryer smoke

Why are duodenal ulcers more common than gastric ulcers? - gastric ulcer more condition_symptoms

How are peptic ulcers:
"H. pylori weakens the protective mucous layer irritate the stomach and duodenum, allowing acid to reach the sensitive lining under too. Acid and bacteria, the lining and cause a sore or ulcer.

A few sites have claimed that stastics duodenal ulcers more frequently than gastric ulcers, but hvaen't say why.