Most cases of diarrhea resolve on their own within one to two days and can be managed at home with fluids, simple dietary changes, and rest. The priority is preventing dehydration, which is the main risk of even a short bout of loose stools. Here’s what works, what to avoid, and when the situation calls for more attention.
Why It’s Happening
Viruses cause about 60% of all gastroenteritis cases, with norovirus alone responsible for half of those. Bacterial infections from Salmonella, E. coli, Campylobacter, and others account for most of the rest. In both cases, the infection lives in your stool, making it contagious while you have symptoms and for about two days after they stop. Thorough handwashing is the single most effective way to keep it from spreading through your household.
Not all diarrhea comes from infections. Food intolerances (especially lactose), medications like antibiotics, stress, and conditions like irritable bowel syndrome can all trigger loose stools. The management steps below apply broadly, but knowing the cause matters if symptoms drag on or keep coming back.
Fluids Come First
Your body loses water and electrolytes (sodium, potassium, chloride) with every loose stool. Replacing them is the most important thing you can do. Plain water helps, but it doesn’t replace lost salts. Oral rehydration solutions, available at any pharmacy, are specifically designed for this. Broth, diluted juice, and sports drinks also work for mild cases.
Take small, frequent sips rather than gulping large amounts, especially if you’re also nauseous. Cold fluids are often easier to tolerate. Avoid caffeine, alcohol, and carbonated drinks, all of which can make diarrhea worse or speed up fluid loss.
You can check for dehydration by pinching the skin on the back of your hand. If it doesn’t flatten back right away, you’re likely dehydrated. Other signs include dark urine, dry mouth, dizziness when standing, and urinating much less than usual.
What to Eat and What to Skip
You don’t need to stop eating. In fact, continuing to eat helps your gut recover faster. Focus on bland, low-fiber foods that are easy to digest: white rice, plain toast, bananas, applesauce, boiled potatoes, plain crackers, and simple chicken or broth-based soups.
Certain foods will make things worse. Avoid:
- Fried and greasy foods, which are harder to digest and can increase intestinal contractions
- Gas-producing vegetables like broccoli, peppers, beans, peas, corn, and leafy greens
- High-fiber fruits like berries and prunes
- Dairy products, especially if they seem to worsen your symptoms or cause bloating
- Sugary foods and drinks, which can pull more water into your intestines and make diarrhea worse
As your stools start to firm up, gradually reintroduce your normal diet over a day or two. There’s no need to restrict yourself longer than necessary.
Over-the-Counter Medications
Loperamide (the active ingredient in Imodium) slows gut movement and reduces the frequency of loose stools. The standard adult dose is two tablets or capsules after the first loose stool, then one after each subsequent one, up to a maximum of eight capsules or four tablets in 24 hours depending on the formulation. It’s not recommended for children under two.
Bismuth subsalicylate (the active ingredient in Pepto-Bismol) can also reduce stool frequency and help with nausea. It works differently, coating the stomach lining and reducing inflammation.
There’s an important caveat: do not use these medications if you have bloody or black stools, a high fever, or severe abdominal pain. These signs suggest a bacterial infection where slowing gut movement could actually trap the bacteria inside longer and make things worse. People with inflammatory bowel conditions like ulcerative colitis should also avoid loperamide.
Probiotics Can Shorten Recovery
Probiotics aren’t a cure, but they can meaningfully reduce how long diarrhea lasts. A large Cochrane review of clinical trials found that probiotics shortened the average duration of infectious diarrhea by about 30 hours and reduced the likelihood of diarrhea continuing past three days by roughly a third. The strain with the strongest evidence is Lactobacillus GG (often sold as Lactobacillus rhamnosus GG), which performed particularly well in studies of rotavirus diarrhea in children, cutting the duration by about 38 hours. Saccharomyces boulardii, a beneficial yeast, also showed reduced stool frequency by day three.
Look for supplements or yogurt drinks that list specific strains on the label. Start them as early in the illness as possible for the best effect.
Managing Diarrhea in Babies and Young Children
Children dehydrate faster than adults, so fluid replacement is even more critical. If your baby is breastfeeding, continue as normal. Breast milk provides both hydration and immune support. For formula-fed babies or toddlers on solid food, offer small sips of water between feeds.
If your child seems dehydrated, a pharmacist or doctor may recommend oral rehydration powder mixed with water. A small amount of diluted squash (not sugar-free) can improve the taste and make kids more willing to drink it. Avoid fruit juice and fizzy drinks until they’re better.
Watch for these dehydration signs in infants and toddlers: dry lips, tongue, or skin; fewer wet diapers than usual; dark or strong-smelling urine; and unusual fussiness or sleepiness. In children, diarrhea that doesn’t improve within 24 hours, a fever above 102°F (39°C), or bloody or black stools all warrant a call to your pediatrician.
Signs That Need Medical Attention
For adults, the threshold is slightly longer: diarrhea lasting more than two days without any improvement. A fever above 102°F, bloody or black stools, severe abdominal pain, or signs of significant dehydration (confusion, rapid heartbeat, inability to keep fluids down) all call for professional evaluation. Severe diarrhea, defined as more than 10 bowel movements a day or fluid losses clearly exceeding what you’re able to drink, also requires medical help regardless of how long it’s been going on.
Most episodes never reach that point. With steady fluid intake, a simple diet, and a day or two of patience, the vast majority of diarrhea cases resolve without any medical intervention at all.