Norovirus (Vomiting Bug): symptoms, self-care and when to get help
Checked against current published health guidance — last reviewed 2026-09-23. See how we check.
Norovirus is a common stomach bug that causes sudden vomiting and diarrhoea. It usually passes in 2 to 3 days. Drink plenty of fluids, stay at home, and do not return to work, school or nursery until 2 days after the symptoms stop.
Overview
Norovirus spreads very easily through contact with people who have it, contaminated surfaces and food. Symptoms usually start suddenly, with feeling sick, forceful vomiting and watery diarrhoea. Some people also get a high temperature, headache and aching arms and legs.
The main risk is dehydration, especially in babies, young children, older people and those with long-term health conditions.
What may help
- Drink plenty of fluids, taking small sips if you feel sick
- Use oral rehydration sachets from a pharmacy if you are at risk of dehydration
- Rest and eat when you feel able to
- Wash your hands with soap and water, because alcohol hand gels do not kill norovirus
- Clean surfaces with a bleach-based cleaner and wash contaminated clothes and bedding on a hot wash
When to see a pharmacist or GP
- Vomiting that lasts more than 2 days, or diarrhoea that lasts more than 7 days
- Signs of dehydration, such as peeing less, dark urine or feeling dizzy
- Symptoms in a baby, an older person or someone with a long-term condition who is getting worse
- You cannot keep any fluids down
When it could be an emergency
- Vomiting blood, or vomit that looks like ground coffee
- Bloody diarrhoea or bleeding from the bottom
- A stiff neck and pain when looking at bright lights
- A sudden, severe tummy pain
- Signs of severe dehydration, such as not peeing all day, confusion or drowsiness
If any of these apply, don't wait — call your local emergency number (see emergency numbers by country, or Red Flags in the app), or go straight to your nearest emergency department.
Want more detail, tailored to your own situation?
Look up "Norovirus (Vomiting Bug)" in the appCommon questions
How long does norovirus last?
Usually 2 to 3 days. Most people get better on their own without treatment.
When can I go back to work or school after norovirus?
Stay off until 2 days after your last episode of vomiting or diarrhoea, because you can still spread the virus.
Does hand gel kill norovirus?
No. Alcohol hand gels do not kill norovirus. Wash your hands with soap and water instead.
How can I tell if someone is dehydrated?
Signs include feeling thirsty, dark yellow strong-smelling urine, peeing less often, dizziness, tiredness and a dry mouth. In babies, look for fewer wet nappies and a sunken soft spot on the head.
Official sources
Related topics
Diarrhoea and Vomiting in Children
Keeping children hydrated and signs of dehydration.
Dehydration in Older People
Signs to watch for and simple ways to help.
Heartburn and Acid Reflux
Burning after meals: self-care and when to get checked.
Fever in Children
Safe self-care and warning signs to watch for.
General information only, last checked 2026-09-23 — not medical advice and not a diagnosis. This page doesn't cover every cause or every person's situation; for anything specific to you or someone in your care, speak to a pharmacist, GP, or other qualified professional. See how we check. Be Health Wise is part of the Be Wise family of apps.