Diarrhoea and vomiting
When diarrhoea and vomiting happen together, it is usually a stomach bug (gastroenteritis) caused by a virus. It is unpleasant but generally settles within a few days. The main risk is dehydration, so getting fluids in — even in small sips — is the most important thing.
Looking after yourself
- Sip fluids often — plain water, dilute squash, or clear soup
- Oral rehydration sachets are helpful, particularly for children and older adults
- Wait an hour after vomiting before trying more fluid
- Return to plain food when you can (toast, rice, banana)
- Stay off work or school until 48 hours after symptoms stop
- Wash hands thoroughly with soap and water
When to get medical help
Use NHS 111 online, call 111, or contact your GP if:
- You cannot keep any fluids down for more than 24 hours
- Diarrhoea lasts more than seven days, or vomiting more than two days
- You have signs of dehydration — very dark urine, dizziness, dry mouth
- A young child, an older person, or someone with a long-term condition is unwell
Call 999 or go to A&E if you vomit blood or something that looks like coffee grounds, have severe abdominal pain, a stiff neck with headache, or become very drowsy.
Further information
This page provides general information only. It is not a diagnosis and is not a substitute for professional medical advice.