Hello, The most possible issue with upper abdomen pain, nausea and diarrhea indicate underlying intestine infection through some sort of bacteria or virus. Primary guidelines of care would be: - Drinking boiled water, lemon juice, coconut water, butter milk - Anti-emetic as ondancetron or metoclopramide with proton pump inhibitor as omeprazole with sips of water on empty stomach - Prefer bland, vegan diet - Avoid all spices, non-veg, junk food, dairy fat - Pre and pro biotics with lacto bacillus content Should discuss the need of antibiotics as metronidazole with rifaximin or else with your doc. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Bhagyesh V. Patel, General Surgeon