Nausea

Unpleasant feeling of heaviness in the upper part of the abdomen (in the stomach pit area), involuntary urge to vomit. Caused by sudden and strong contractions of the stomach and irritation of the nervous plexuses of the abdominal cavity. This is a nonspecific symptom with various causes, such as seasickness, food poisoning, gastritis, side effects of medication, morning sickness in the early stages of pregnancy.

Source | Author Doctor Nikas Samuolis, reviewed by Prof. Virginijus Šapoka | Vilnius University | Faculty of Medicine | Head of the Department of Internal Medicine, Family Medicine, and Oncology