Most cases of diarrhea resolve on their own within one to three days, but you can speed recovery and reduce discomfort with a few straightforward steps: stay hydrated, eat the right foods, and use an over-the-counter medication if needed. Diarrhea lasting less than two weeks is classified as acute, and it’s almost always caused by a viral infection, food poisoning, or something you ate that didn’t agree with you.
Replace Fluids First
Loose, watery stools pull water and electrolytes out of your body fast. Dehydration is the main risk with diarrhea, not the diarrhea itself. Signs you’re getting dehydrated include urinating less than usual, a dry mouth and throat, and feeling dizzy when you stand up.
Water alone isn’t ideal because it doesn’t replace the sodium and potassium you’re losing. Sip on clear broth, diluted juice, or an oral rehydration solution throughout the day. Sports drinks work in a pinch, though they contain more sugar than optimal. Take small, frequent sips rather than gulping large amounts, especially if you’re also feeling nauseous.
What to Eat (and What to Skip)
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s fine for the first day or two, but there’s no need to limit yourself to just those four foods. Once your stomach settles, adding more nutritious options actually helps you recover faster. Cooked carrots, butternut squash, sweet potatoes without the skin, avocado, skinless chicken, fish, and eggs are all bland and easy to digest while giving your body the protein it needs to bounce back.
Early refeeding after the worst has passed doesn’t prolong diarrhea. Evidence suggests it may shorten the episode by about half a day compared to prolonged fasting or very restricted diets.
What you avoid matters just as much. Dairy, greasy or fried foods, caffeine, and alcohol can all worsen symptoms. Pay special attention to sugar alcohols like sorbitol, which acts as an osmotic laxative, meaning it draws water into your intestines and makes things worse. As little as 10 grams of sorbitol can cause bloating and gas, and 20 grams triggers cramping and diarrhea in most people. You’ll find sorbitol in sugar-free gum, dietetic candies, and many “no sugar added” snack foods. If you’re dealing with unexplained or recurring diarrhea, check your food labels for sorbitol and other sugar alcohols like mannitol and xylitol.
Over-the-Counter Medications That Work
Loperamide (the active ingredient in Imodium) is the most effective OTC option for slowing things down. It works by binding to receptors in your gut wall, which reduces the muscle contractions that push food through your intestines too quickly. It also helps your intestines reabsorb water instead of sending it straight through, and it tightens the anal sphincter, reducing that feeling of urgency. The standard approach for adults is two caplets (4 mg) at first, then one caplet (2 mg) after each loose stool, up to a maximum of eight caplets in 24 hours.
Bismuth subsalicylate (Pepto-Bismol) is a second option. It works differently: it reduces inflammation in the gut, slows intestinal secretions, and has mild antimicrobial properties. It’s gentler than loperamide but generally less effective for stopping diarrhea quickly. A few groups should avoid it entirely. Because it contains a compound related to aspirin, anyone with an aspirin allergy or sensitivity should steer clear. Children and teenagers recovering from the flu or chickenpox should not take it due to the risk of Reye’s syndrome. It also interacts with blood thinners and several other medications, so check with a pharmacist if you take prescription drugs.
Probiotics Can Shorten Recovery
Certain probiotic strains help your gut recover faster. The best-studied one for acute diarrhea is Saccharomyces boulardii, a beneficial yeast you can find in most pharmacies. A meta-analysis of six randomized controlled trials found that it shortened diarrhea duration by an average of 1.6 days compared to no probiotic. The effect was even more pronounced for rotavirus infections, where it cut duration by about 2 days. Probiotics aren’t a quick fix on their own, but combined with rehydration and a reasonable diet, they meaningfully speed up the process.
Soluble Fiber for Ongoing Loose Stools
This one sounds counterintuitive, since most people associate fiber with going to the bathroom more. But soluble fiber, like psyllium husk, absorbs water in the intestines and adds bulk to loose stools. It works both directions: if things are moving too fast, the viscous gel it forms slows transit time and firms everything up. This is particularly helpful for people with irritable bowel syndrome who cycle between loose stools and constipation. The effective dose in studies is around 20 to 25 grams per day, taken with plenty of water (roughly 500 mL per 25 grams of fiber). Start with a smaller amount and work up to avoid gas and bloating.
Managing Diarrhea in Young Children
Children under five need a different approach. The American Academy of Pediatrics recommends oral rehydration as the first line of treatment for mild to moderate dehydration, and it works just as well as IV fluids in most cases. Pedialyte or a similar oral rehydration solution is better than juice or soda, which can make diarrhea worse in small kids. Resume a normal, age-appropriate diet as soon as the child can tolerate it, including milk. Continuing regular feedings helps restore nutritional balance and may slightly shorten the illness.
Anti-diarrheal medications like loperamide are not recommended for infants and young children. The potential side effects in small bodies outweigh the benefits, and most episodes resolve with fluids and time alone.
Signs That Need Medical Attention
Most diarrhea passes without any medical care, but certain symptoms signal something more serious. The CDC flags these as reasons to see a doctor promptly: bloody stools, a fever over 102°F, diarrhea lasting more than three days, vomiting so frequent you can’t keep liquids down, or signs of dehydration like very little urination, dry mouth, or dizziness on standing. Pregnant women with fever and diarrhea should also seek care right away.
If your diarrhea lasts two to four weeks, it’s considered persistent. Beyond four weeks, it’s chronic, and that pattern points toward something other than a simple infection. Conditions like irritable bowel syndrome, food intolerances, celiac disease, or inflammatory bowel disease can all cause ongoing loose stools and need proper evaluation.