Nausea is the unpleasant feeling of queasiness or sickness in your stomach that often precedes vomiting, accompanied by symptoms like cold sweats, dizziness, and pale skin, and can be triggered by illness, food poisoning, motion, pregnancy, medication, stress, or migraines, but usually resolves with bland foods, ginger, or rest; see a doctor for severe or persistent symptoms, especially with vomiting blood or severe headache.
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