Most cases of diarrhea resolve on their own within a few days, but the right combination of fluids, food choices, and over-the-counter options can shorten that timeline and keep you comfortable. What helps most depends on the cause, but staying hydrated is the single most important thing you can do regardless.
Fluids Come First
Diarrhea pulls water and electrolytes out of your body fast. Replacing them is more urgent than stopping the diarrhea itself. Water alone isn’t ideal because it doesn’t replace lost sodium and potassium. Oral rehydration solutions, broth, and diluted fruit juices all work better. Sports drinks are fine for mild cases, though they contain more sugar than medical rehydration formulas.
Sip steadily rather than gulping large amounts at once, which can trigger more cramping. If your urine turns dark yellow, you’re already behind on fluids. Other dehydration warning signs include skin that doesn’t bounce back quickly when you pinch it, sunken eyes or cheeks, dizziness, and confusion. Diarrhea lasting more than 24 hours, a fever above 102°F, or bloody or black stool all warrant medical attention.
What to Eat (and What to Skip)
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s a reasonable starting point for the first day or two, but there’s no reason to limit yourself to just those four foods. Harvard Health notes that once your stomach has settled, adding cooked squash, carrots, skinless sweet potatoes, avocado, eggs, skinless chicken or turkey, and fish gives you the protein and nutrients your body needs to actually recover. All of these are bland and easy to digest.
More important than what you eat is what you avoid. Greasy, fried, and high-fat foods speed up gut contractions. Dairy can be hard to handle temporarily because diarrhea sometimes reduces your ability to digest lactose. Caffeine and alcohol both stimulate the intestines and worsen fluid loss.
One commonly overlooked trigger is sugar alcohols, especially sorbitol. Found in sugar-free gum, mints, candies, and many “diet” or “no sugar added” processed foods, sorbitol has well-documented laxative effects. It also occurs naturally in apples, pears, peaches, plums, prunes, and dried fruits like dates and figs. As little as 5 grams per day can cause gas, bloating, and urgency, while doses above 20 grams reliably cause diarrhea. If you’re chewing through a pack of sugar-free gum daily or snacking on dried fruit while already having loose stools, that alone could be making things worse.
How Soluble Fiber Helps
This sounds counterintuitive since fiber is often associated with keeping things moving, but soluble fiber actually absorbs water in your gut and adds bulk to loose stool. It forms a gel-like material that slows digestion down. Good sources include oats, bananas, applesauce, cooked carrots, avocados, and psyllium (the main ingredient in fiber supplements like Metamucil). Insoluble fiber, found in raw vegetables, whole wheat, and nuts, does the opposite and can make diarrhea worse. Stick with soluble sources until things firm up.
Over-the-Counter Medications
Two main options sit on pharmacy shelves: loperamide (Imodium) and bismuth subsalicylate (Pepto-Bismol). They work differently, and loperamide is the stronger choice for acute diarrhea. It slows intestinal contractions, giving your body more time to absorb water from stool. In a head-to-head comparison, loperamide provided faster relief, reduced the number of unformed stools more effectively, and was rated significantly better by patients after 24 hours.
Bismuth subsalicylate takes a gentler approach, reducing inflammation in the gut lining and binding some of the toxins produced by bacteria. It’s better suited for milder symptoms or traveler’s diarrhea, and it can help with nausea at the same time. One important caution: bismuth subsalicylate is chemically related to aspirin. If you’re allergic or sensitive to aspirin, avoid it. It also should not be given to children or teenagers with flu-like symptoms because of the risk of Reye’s syndrome, a rare but serious condition.
Neither medication should be used if you have a high fever or bloody stools, which can signal a bacterial infection that needs to run its course or be treated with antibiotics.
Probiotics and Gut Recovery
Probiotics can help, but strain matters more than most labels suggest. The yeast-based probiotic Saccharomyces boulardii has the strongest evidence. In a large analysis published in Frontiers in Pediatrics, it significantly shortened the duration of diarrhea compared to placebo. It works partly by competing with harmful bacteria for space in your gut and by strengthening the intestinal lining.
Lactobacillus rhamnosus GG, one of the most widely marketed probiotic strains, showed mixed results. It reduced the proportion of people still experiencing diarrhea by the end of treatment, but it did not significantly shorten how long each episode lasted. If you’re choosing a probiotic specifically for diarrhea, look for one containing Saccharomyces boulardii rather than grabbing the first bottle you see.
Yogurt with live cultures and fermented foods like kefir can also contribute beneficial bacteria, though at lower and less standardized doses than supplements.
Timeline for Recovery
Viral gastroenteritis, the most common cause, typically runs its course in one to three days. Food poisoning usually resolves within 24 to 48 hours. Traveler’s diarrhea can linger for three to five days without treatment but often responds quickly to loperamide or antibiotics. If diarrhea persists beyond a week, recurring patterns may point to food intolerances (lactose, fructose, gluten), irritable bowel syndrome, or other chronic conditions worth investigating.
During recovery, reintroduce foods gradually. Your gut lining takes a bit longer to heal than your symptoms suggest, so a few days of easy-to-digest meals after the diarrhea stops helps prevent a relapse.