3. Nausea and Persistent Vomiting

As Crohn's disease progresses, its symptoms tend to worsen as well. People in the early stages may experience nausea and vomiting occasionally, but it is not usually a chronic issue. Once the disease has progressed, however, these become significantly more common. The cause behind this symptom can be as simple as inflammation irritating the stomach enough to trigger vomiting. Inflammation can also lead to scarring in the small intestine, and these scars can obstruct the digestive tract, leading to nausea and vomiting.

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