Traveler's diarrhea is no fun, especially on long flights, trains, bus, road trips, hiking, backpacking, or camping. Add activated charcoal as essentials to your international travel packing list for what to pack in your first aid kit. How to treat diarrhea when traveling. Natural remedies to bring relief when you're sick and how to stop and how to get rid of it when food poisoning are causes. Eat foods with probiotics and good bacteria. India travel tips, Asia.