While nausea is an uncommon symptom of a peptic ulcer and usually gastric, it has been known to happen to people with duodenal ulcers. For the most part, nausea that comes from duodenal ulcers will be a natural response to the pain. Alternatively, if you have a pre-existing condition relating to the gut, this could be the cause. Generally, eating can curb feelings of nausea.
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