Nausea is stomach distress with distaste for food and an urge to vomit. Nausea can be acute and short-lived, or it can be prolonged. When prolonged, it is a debilitating symptom. Nausea (and vomiting) can be psychological or physical in origin.

Symptom severities
Severe
1,108
Moderate
3,019
Mild
5,310
None
9,519
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