9years old son?

Doctor can evaluate: Diarrhea can be from variety of causes. People usually see doctors if symptoms are bad or if they last more than 1-2 days. When diarrhea first starts happening, a person can benefit by stopping eating and start just drinking small amounts (2-3 ounces) of something like Pedialyte or half-strength Gatorade, every hour for one day. If diarrhea continues, or patient gets weak, etc..., ER can evaluate.