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First, it’s key to identify if your diarrhea might have a particular cause; since it started after eating street food, it could be a result of a viral or bacterial infection, often referred to as traveler’s diarrhea. While sticking to bland foods like rice, bananas, applesauce, and toast (known as the BRAT diet) is a solid beginning, these are generally supportive and don’t address any potential underlying infection. Keeping hydrated is important, but when fluids are lost continuously, it’s crucial to consider oral rehydration solutions which replenish electrolytes more effectively than water alone. Regarding medication, over-the-counter options like loperamide can help reduce diarrhea by slowing down intestinal movement. However, they’re generally recommended for short-term relief, and not always suitable if an infection is present, as they can potentially prolong the infection. If your symptoms have persisted for a week, it might be wise to consult a healthcare provider to rule out any bacterial infection that might require antibiotics or to assess for other conditions. Probiotics could be used in moderation as they help restore the natural balance of bacteria in your gut, though they’re not a magic fix. While it’s important to manage the symptoms, looking for red-flag symptoms, such as severe abdominal pain or blood in stools, is critical, as these would warrant immediate medical attention. Given your upcoming travels, addressing this sooner rather than later would be beneficial. Adjusting your diet to avoid high-fiber foods, dairy products, and fatty/greasy foods until your digestion normalizes might help, as these could exacerbate your symptoms. Additionally, practice good hygiene to prevent further infections, especially when eating out or traveling. If the situation doesn’t improve in the next couple of days, consulting a doctor would be the best course of action to get a targeted treatment plan.