Q&A: How long will it take my baby's diarrhea to pass?

Is she also vomiting? Does she have a fever? Is there any blood or mucus in her stools? Does she look sick? Is she urinating less than usual? If 'yes' to any of the above questions, you need to have your baby seen by a doctor. If she looks well and just has runny, even watery stools, then the simple answer is to feed her. Pedialyte is more appropriate when there is also vomiting. The best diet for diarrhea is one of bland carbohydrates—crackers, rice, applesauce—and her usual formula. If she refuses this than any liquid, a rehydrating solution like pedialyte or formula, at least keeps liquid going in, but the sooner she takes solids, the sooner she can add some bulk back into her stools.