Nausea & Vomiting
Educational content • Medi Info HubUpdated: 10/19/2026
Overview
Nausea is an unpleasant sensation of the urge to vomit, whereas vomiting (emesis) is the forceful oral expulsion of gastric contents triggered by coordinated autonomic reflex pathways controlled by the brainstem chemoreceptor trigger zone.
Possible Causes
Infectious pathogens (Norovirus, Rotavirus), bacterial enterotoxins, vestibular disturbances, medication adverse effects (chemotherapy, NSAIDs), and intracranial hypertension.
When to Seek Care
Seek medical care if vomiting prevents hydration for over a day, is accompanied by high fever, or occurs during pregnancy.
The information provided on this website is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.