Nothing derails a trip faster than spending three days in a foreign bathroom. I’ve learned how can I avoid getting sick while traveling internationally the hard way, including a memorable encounter with street food in a country I’ll diplomatically leave unnamed. The good news: most travel illness is preventable with boring, unsexy precautions.

This isn’t about fear, it’s about stacking the odds. A few habits, consistently applied, will keep you exploring instead of recovering. Here’s what actually works, backed by what travel medicine doctors recommend.

Water and ice: the number one rule

In much of the world, tap water is the fastest route to misery. Drink sealed bottled water, use it for brushing your teeth, and say no to ice unless you’re confident about the source. I once got sick from a fancy hotel’s welcome drink, the ice was the culprit. Paranoia about ice is just wisdom with experience.

That said, don’t be careless in the other direction either. Dehydration in hot climates will flatten you just as fast. Carry water constantly and drink before you’re thirsty. The CDC’s travel health pages have country-specific water safety guidance worth checking before you fly.

How can I avoid getting sick while traveling internationally through food choices

The old rule, boil it, cook it, peel it, or forget it, still holds. Eat food that’s cooked fresh and served steaming hot. Buffets sitting at room temperature are petri dishes with tablecloths. Salads washed in local water and pre-cut fruit are the usual suspects in traveler’s diarrhea cases.

Street food gets an unfair reputation. A busy stall cooking to order in front of you is often safer than a half-empty restaurant with a tired buffet. Watch for high turnover, fresh cooking, and clean utensils. My full approach to eating well abroad is in my guide on finding authentic local food while traveling abroad, and the safety lens applies to every bite.

Your hands are the vector

You touch a handrail, a menu, money, then your face, that’s the chain of infection. Wash hands with soap whenever you can, and carry alcohol-based sanitizer for when you can’t. I sanitize before every meal abroad without exception, and I haven’t had a stomach bug in years.

Keep your hands away from your eyes, nose, and mouth in transit. Airplanes, buses, and markets are high-touch environments. It sounds obsessive until you compare it to losing three days of a ten-day trip. The math is simple.

Vaccines, meds, and the pre-trip appointment

Visit a travel clinic four to six weeks before departure. Depending on destination, you might need hepatitis A, typhoid, or yellow fever vaccines, and some countries require proof of yellow fever vaccination for entry. This is the single highest-value hour of trip prep.

Pack a small medical kit: anti-diarrheal tablets, oral rehydration salts, pain relievers, antihistamines, any prescriptions in original bottles, and altitude or motion sickness meds if relevant. Rehydration salts are the unsung heroes, they turn a bad stomach day into a manageable one.

Daily habits of healthy travelers

  • Sanitize before eating: Every meal, every snack, no exceptions. Make it as automatic as picking up the fork.
  • Eat where it’s busy: High turnover means fresh food. Empty restaurants at mealtimes are a warning sign.
  • Peel your own fruit: Fruit you peel yourself is safe. Pre-cut fruit of unknown washing history is not.
  • Sleep enough: Exhaustion tanks your immune system. All-nighters in your twenties were free; now they cost you travel days.
  • Ease into the local food: Give your gut a day or two to adjust before the spiciest street stall. Ramp up, don’t cannonball.
  • Know the local emergency number: Save it in your phone on day one. You probably won’t need it, but panic-googling at 2 a.m. is avoidable.

Myths that get travelers sick

  • Alcohol kills germs in food: The beer with your sketchy meal does nothing for foodborne bacteria. Enjoy the beer, but don’t count on it as medicine.
  • Fancy restaurants are always safe: Price doesn’t sterilize. Kitchens cut corners everywhere; judge by freshness and turnover, not decor.
  • I’ve been fine before: Every destination’s microbes are new to your gut. Past luck in Thailand says nothing about Peru.
  • Probiotics make you immune: They may help marginally, but they’re not armor. Don’t let supplements replace actual precautions.
  • It’s just a little ice: Ice is frozen local water. In risky-water regions, it’s the most common gotcha there is.

Staying healthy abroad: your questions answered

Do I really need travel vaccines?

For many destinations, yes. Hepatitis A and typhoid are common recommendations, and some countries require yellow fever proof for entry. A travel clinic visit four to six weeks before departure is the highest-value hour of trip prep. Don’t skip it.

Is the tap water safe in tourist hotels?

Not necessarily, even in nice hotels. If the destination has questionable water, use sealed bottled water for drinking and brushing teeth, and be wary of ice. I got sick from a fancy hotel’s welcome drink once; the ice was the culprit. Paranoia about ice is just experience.

What should I pack in a travel medical kit?

Anti-diarrheal tablets, oral rehydration salts, pain relievers, antihistamines, any prescriptions in original bottles, bandages, and motion sickness meds if relevant. Rehydration salts are the unsung heroes that turn a bad stomach day into a manageable one.

Can I drink the water on airplanes?

The bottled water served by crew is fine. Avoid drinking from the lavatory taps; aircraft water tanks are notoriously questionable. Bring your own bottle and ask crew to fill it, or accept the served cups. Staying hydrated matters more than the source anxiety.

What do I do if I get seriously sick abroad?

Know the local emergency number (save it day one), contact your travel insurance’s assistance line, and head to an international hospital or clinic in major cities. For US citizens, the nearest embassy can provide lists of local doctors. Don’t tough out anything severe; get care.

The bottom line

Sealed water, steaming-hot fresh food, relentless hand hygiene, and a pre-trip clinic visit. That’s genuinely most of it. These habits are boring and they work, which is exactly why seasoned travelers swear by them. Protect the trip and the trip takes care of itself. You might also like traveling with a baby on a long flight.