Hi thanks for asking question. If you have associated abdominal Pain then bacterial gastroenteritis may be the cause. Rice watery stool can be seen in cholera. Sometime viral diarrhea can lead to watery diarrhea. You can get your stool examined to see whether pus cell or egg of parasite present or not. Maintain your hydration with lots of water and frit juice.ORS taken along with water to maintain electrolyte balance. Avoid spicy food and take semisolid light meal at frequent interval. Avoid excess tea , coffee. Take ornidazole plus ofloxacin combination drug. Mostly within few days you will get relief. If still problem ultrasound and endoscopic examination may needed