This page summarises publicly available NHS information for educational purposes only. It is not medical advice or a diagnosis. Always consult a qualified healthcare professional.
What is norovirus?
Norovirus, sometimes called the winter vomiting bug, is a very common stomach bug that causes sudden vomiting and diarrhoea. Other symptoms may include a high temperature, body aches, and headaches. Although it's called the winter vomiting bug, you can get norovirus any time of year. Most people feel better within 2 to 3 days and can recover at home with rest and fluids.
When NHS resources suggest seeing a GP
- A baby under 12 months old has symptoms
- A child stops breast or bottle feeding while ill
- A child under 5 has signs of dehydration (fewer wet nappies, drowsy)
- You or your child keep being sick and cannot keep fluids down
- You or your child have bloody diarrhoea or bleeding from the bottom
- You have diarrhoea for more than 7 days or vomiting for more than 2 days
Self-care information from NHS
- Drink lots of fluids (water, squash, or oral rehydration sachets) to avoid dehydration
- Rest at home until you have been symptom-free for 48 hours
- Wash your hands with soap and water — alcohol gels do not kill norovirus
- Wash clothes and bedding with vomit or poo on a 60°C wash, separately
- Clean toilet seats, taps, and door handles with bleach-based cleaner
- Eat when you feel able — plain foods like toast, rice, or bananas are often tolerated
Common questions
How long does norovirus last?
Norovirus symptoms usually start suddenly and last 1 to 3 days. Most people feel much better by day 3, though tiredness can linger a few more days. You remain contagious for at least 48 hours after symptoms stop.
How is norovirus spread?
Norovirus spreads very easily through contact with an infected person, contaminated surfaces, or food prepared by someone with the virus. Hand-washing with soap and water is the best prevention — alcohol gels do not work.
When can I return to work or school after norovirus?
Stay home until you have had no symptoms (vomiting or diarrhoea) for at least 48 hours. Going back sooner risks spreading the virus to colleagues, classmates, or vulnerable people.
Can I take anti-diarrhoea medicine with norovirus?
Anti-diarrhoea medicines like loperamide are not usually recommended for viral stomach bugs. The diarrhoea helps your body get rid of the virus. Focus on fluids to avoid dehydration instead.
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This page is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional about your individual situation. NorMed organises publicly available NHS information and is not affiliated with the NHS.