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Nausea is a feeling of discomfort or unease in the stomach that may be accompanied by the urge to vomit. It is a common symptom that can be caused by a variety of factors, including:

  1. Digestive problems such as acid reflux, gastritis, or an ulcer.
  2. Infections such as gastroenteritis, influenza, or hepatitis.
  3. Medications such as antibiotics, chemotherapy drugs, or opioids.
  4. Pregnancy: nausea is a common symptom during the first trimester of pregnancy.
  5. Motion sickness caused by a disturbance in the inner ear due to motion, such as when traveling by car, boat, or airplane.

Other factors that can contribute to nausea include stress, anxiety, dehydration, and certain medical conditions such as migraines or vertigo.

Symptoms of nausea may include a feeling of queasiness in the stomach, a loss of appetite, and the urge to vomit. Treatment for nausea depends on the underlying cause of the symptoms. In some cases, changes in diet or lifestyle, such as avoiding certain foods or getting more rest, may help to alleviate symptoms. Medications such as antiemetics can also be used to relieve nausea and vomiting. It is important to seek medical attention if nausea persists or is accompanied by other symptoms, such as severe abdominal pain, fever, or dehydration.

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  • "Nausea and Vomiting." MedlinePlus, U.S. National Library of Medicine, 1 Dec. 2021,
  • Andrews, Paul L.R. "The Evolution of Nausea and Vomiting." Frontiers in Medicine, vol. 6, 2019, p. 124.