Bali belly: how to avoid it and what to do if it hits (2026)

"Bali belly" is the local name for the traveller's stomach bug that catches a share of visitors in their first weeks. Usually it's 1–3 rough days, not a disaster. Here's the prevention and the fix.

Where it comes from

Not "dirty food" as the myth goes, but a stack of factors: unfamiliar microflora, tap water, heat that spoils food fast, and a sudden diet change — the gut gets everything at once.

Six prevention rules

• Drink only bottled or filtered water; brushing teeth with tap water is fine for most
• First week: skip raw seafood and salads from questionable places
• Pick warungs by turnover — where locals queue, food never sits
• Wash fruit with drinking water or peel it
• Ice in proper cafes is factory-made and safe; street-cart ice is a lottery
• Hands and sanitiser — boring and effective

If it hits: the recovery plan

• Days 1–2: rest, lots of water, oral rehydration salts (any pharmacy or minimarket), sorbents. Food: rice, bananas, toast
• Probiotics — pharmacies stock plenty and will suggest them
• Antibiotics only on a doctor's advice — not on a group chat's
• See a doctor if: high fever, blood, symptoms beyond three days, or serious dehydration — especially with kids

The money angle

A clinic visit with tests and an IV drip costs real money in Bali's international clinics — with travel insurance it costs nothing. And housing with a kitchen halves your food-risk surface: cook part of your meals in a villa from the catalogue. Local food safety by area — in the food guide; more health questions — in the FAQ.