Stomach Flu (Gastric Flu): What It Really Is and How to Manage It
Despite its name, ‘stomach flu’ (also called gastric flu) isn’t related to influenza at all. It’s a common term used to describe viral gastroenteritis - an infection that affects the stomach and intestines.
What causes stomach flu?
Stomach flu is usually caused by viruses that irritate the gut lining. These viruses spread easily through:
Close contact with infected people
Contaminated food or water
Touching contaminated surfaces and then touching your mouth
Common symptoms
Symptoms often come on suddenly and may include:
Nausea and vomiting
Diarrhoea
Stomach cramps
Mild fever
Headache or muscle aches
Most people start to feel unwell within 1–3 days of exposure, and symptoms usually settle within a few days.
How to manage stomach flu at home
There’s no specific treatment to ‘cure’ viral gastroenteritis, but symptoms can usually be managed safely at home:
Stay hydrated – take small, frequent sips of water, and use oral rehydration salts after vomiting to rehydrate
Rest – your body needs time to recover
Eat lightly – bland foods such as toast, rice or bananas may be better tolerated (follow two rules: 1. No spices or greasiness, 2. Beige is best)
Avoid alcohol and caffeine until symptoms settle
When to seek medical advice
You should seek professional advice if:
Symptoms last longer than a few days
You can’t keep fluids down
There are signs of dehydration (dark urine, dizziness, dry mouth)
The person affected is elderly, pregnant, or has a long-term condition
Stomach flu is unpleasant but usually short-lived, and most people recover fully with rest and fluids.
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