Practical guide. Check official requirements, conditions, opening times and prices before you travel.

‘Bali belly’ is the holiday nickname for travellers’ diarrhoea and related stomach upsets. It can mean anything from a few miserable hours to an illness that needs prompt medical attention. The sensible approach is neither to panic nor to treat every stomach complaint as harmless. Understand the symptoms, look after hydration and know when to seek professional care.

What is Bali belly?

The phrase is not a medical diagnosis. Travellers’ diarrhoea can be caused by bacteria, viruses or parasites acquired through contaminated food or water. Other problems, including medication side effects and non-infectious gastrointestinal conditions, can look similar. Symptoms commonly include loose stools, stomach cramps, nausea and sometimes vomiting or fever.

The CDC identifies travellers’ diarrhoea as a common travel illness and notes that food hygiene and local sanitation affect risk. You can follow sensible food precautions and still become ill; getting sick is not proof that a particular restaurant was negligent.

The first priority is hydration

Diarrhoea and vomiting both remove fluid and important salts. Sip safe water frequently and consider oral rehydration solution, particularly when you are losing a lot of fluid. Oral rehydration salts are sold at many Indonesian pharmacies; ask for oralit if that helps explain what you need. Use safe water and follow the packet’s instructions precisely.

Small, repeated sips may be easier to tolerate than a large bottle swallowed at once. If you cannot keep fluids down, feel faint, stop urinating normally or notice other dehydration signs, get medical assessment promptly. Children, older adults, pregnant travellers and people with chronic illnesses may deteriorate faster.

What to eat while recovering

Eat when you feel able rather than forcing a feast. Simple familiar foods such as rice, toast, bananas or soup may be easier on the stomach. Avoid alcohol, very heavy meals and foods that obviously aggravate your symptoms. Rest somewhere cool; dehydration and a blazing afternoon scooter trip make a miserable combination.

Do not assume that fasting for days will ‘starve’ an infection. Your body needs fluid and, when tolerated, nutrition. If symptoms are severe or prolonged, medical advice matters more than internet diet folklore.

Can you take medicine for Bali belly?

Medication depends on the situation. The CDC's 2026 Yellow Book describes supportive care and circumstances in which anti-diarrhoeal medicine or clinician-directed antibiotics may be appropriate. Do not self-prescribe antibiotics simply because a friend used them on a previous trip. Unnecessary treatment can cause side effects and contribute to antimicrobial resistance.

A pharmacist or doctor can help distinguish a minor episode from something requiring investigation. Anti-diarrhoeal drugs may be unsuitable in some circumstances, including certain severe infections. Tell the clinician about fever, blood in the stool, pregnancy, medical conditions and other medicines you take.

When to seek urgent medical care

Get urgent assessment for blood in stool, severe or worsening abdominal pain, high or persistent fever, confusion, signs of significant dehydration, or inability to keep fluids down. Seek advice early for infants, young children, older travellers and anyone with a weakened immune system. If diarrhoea persists or returns over an extended period, testing may be needed to identify a cause.

If you need help navigating local healthcare, contact your travel insurer's emergency assistance line. Keep your passport details, insurance policy, hotel address and a clear history of symptoms available for the treating clinician.

How to reduce the risk before you eat

Choose food that is prepared hygienically and served at an appropriate temperature. Hot meals should arrive hot; chilled food should be kept chilled. Be cautious with raw or undercooked meat, seafood, eggs and produce that may have been washed in unsafe water. The CDC recommends handwashing and attention to how food and drinks have been prepared.

That doesn't mean you must abandon warungs and survive on hotel toast. A busy, well-run local eatery serving freshly cooked food can be an excellent choice. Watch the obvious practical signs: clean handling surfaces, food not sitting for hours in the heat and staff treating raw and cooked ingredients separately.

What about ice, tap water and smoothies?

Use a reliable source of drinking water. Sealed bottled water, properly treated water or other demonstrably safe supplies are preferable to untreated tap water. Commercially manufactured ice may be safe, but you can't reliably judge its source by appearance alone. Where in doubt, choose a drink without ice.

For smoothies and cut fruit, consider how ingredients are washed, stored and handled. Peel fruit yourself where possible. Don't share a water bottle with somebody who is ill, and wash your hands before eating—even on days when the beach is calling.

Don't forget other causes of illness

A fever after visiting Bali is not necessarily ‘Bali belly’. Mosquito-borne diseases such as dengue can cause fever and other serious symptoms. If fever, rash, unusual pain or pronounced weakness develops, tell a healthcare professional about your travel. The CDC also advises travellers to avoid animal bites because rabies exposure requires urgent assessment.

What should your travel companion do?

Help the unwell person obtain safe fluids and rest. Avoid sharing utensils or towels unnecessarily, wash hands thoroughly and clean frequently touched surfaces. If vomiting or diarrhoea is severe, favour practical medical care over waiting for an Instagram recommendation of the ‘best cure’.

For group holidays, adjust the schedule. An ill person should not be pushed into an early-morning boat crossing, mountain trek or all-day vehicle tour because everyone has already paid. Talk to operators about rescheduling and check your insurance terms.

How to tell an ordinary upset from a warning sign

A mild case may involve loose stools and manageable cramps while you can still drink, rest and urinate normally. The picture changes if you develop persistent vomiting, blood in stools, marked dizziness, severe pain, high fever or very little urine. Those signs warrant prompt assessment, not a promise to ‘see how it feels after sunset’. An infant, pregnant traveller or person with chronic disease deserves a lower threshold for seeking help.

If you return home with persistent digestive symptoms, tell your clinician exactly where you travelled, what you ate or drank if relevant, when symptoms began and whether anyone else became unwell. Some infections need testing rather than another round of over-the-counter remedies.

Setting up a low-stress recovery day

Tell your travel companions you're changing plans. Set a bottle of safe water and properly prepared oral rehydration solution nearby, keep your phone charged and choose a cool place to rest. Wash hands with soap, especially after using the bathroom, and avoid preparing food for others while symptomatic. If staying alone, let someone you trust know you're unwell and agree on a time to check in.

If you have booked a boat crossing or strenuous excursion, contact the operator early. Keeping an ill person hydrated and near a bathroom is a better holiday decision than sitting through a long, rough sea journey.

Food safety without food fear

An excellent Bali trip should include local food, not a list of restaurants declared ‘safe’ by rumour. A busy warung preparing food fresh, serving hot dishes hot and keeping surfaces clean may be a great choice. Risk is about handling and hygiene, not whether the menu is Indonesian or international. Be cautious of food held for long periods at ambient temperature, untreated drinking water and raw ingredients without clear safe washing arrangements. You can be adventurous without being careless.

Frequently asked questions

How long does Bali belly last?

Many uncomplicated episodes settle within a few days, but the duration depends on the cause. Persistent or severe symptoms require evaluation.

Should I drink sports drinks?

They may provide some fluid, but oral rehydration solution is specifically formulated to replace water and electrolytes lost through diarrhoea. Follow professional advice when dehydration is significant.

Can I swim while I have diarrhoea?

Avoid swimming, especially in shared pools, while ill. You may spread infection or worsen dehydration.

Should I buy antibiotics in advance?

Discuss individual travel medicine needs with a clinician before departure rather than taking antibiotics unnecessarily.

The takeaway

Hydrate early, choose food and water sensibly, and know the warning signs. Most stomach upsets are manageable, but severe illness is a medical issue—not an inconvenience to be fixed by powering through another cocktail.

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