Most cases of diarrhea clear up on their own within two to three days, and the most important thing you can do is stay hydrated while your gut recovers. Beyond fluids, the right food choices, a few targeted over-the-counter options, and knowing when to escalate care can make a real difference in how quickly you bounce back.
Hydration Comes First
Diarrhea pulls water and electrolytes out of your body fast. Replacing both is the single most effective thing you can do. Plain water helps, but it doesn’t replace the sodium and potassium you’re losing with each loose stool. Oral rehydration solutions (sold as Pedialyte, DripDrop, or store-brand equivalents) are specifically designed to match what your gut can absorb efficiently. They contain a precise balance of sugar and salt that pulls water across your intestinal lining and into your bloodstream.
What you drink matters as much as how much you drink. Sodas, fruit juice, and sports drinks with high sugar concentrations are hypertonic, meaning they contain more dissolved particles than your blood does. That actually draws water out of your body and into your intestines, the opposite of what you need. If you don’t have an oral rehydration solution on hand, dilute apple juice by half with water, or sip clear broth. Aim for small, frequent sips rather than gulping large amounts, especially if nausea is part of the picture.
What to Eat (and What to Avoid)
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 research showing it works better than other bland foods. The real principle is simpler: eat things that are easy to digest and low in fat, fiber, and strong spices. Good options include brothy soups, oatmeal, boiled potatoes, crackers, unsweetened dry cereal, and plain pasta.
Once your stomach starts to settle, shift toward more nutritious foods so your body has what it needs to recover. Cooked carrots, butternut squash, sweet potatoes without the skin, avocado, skinless chicken or turkey, fish, and eggs all fit the bill. They’re still gentle on your gut but provide the protein and micronutrients that a strict BRAT diet lacks.
Certain foods and ingredients actively make diarrhea worse. Lactose (the sugar in milk and soft cheese) is a common trigger because your gut’s ability to break it down drops temporarily during a bout of diarrhea. Sugar alcohols like sorbitol, mannitol, and xylitol, found in sugar-free gum, candy, and many “diet” products, are poorly absorbed even in a healthy gut. They sit in your colon, pull in water through osmosis, and get rapidly fermented by bacteria, producing gas, cramping, and more loose stools. Fructose in large amounts (think honey, pears, apples, and high-fructose corn syrup) can overwhelm your intestine’s transport capacity and do the same thing. Coffee, alcohol, and greasy or fried foods are also worth skipping until you’ve had normal stools for a day or two.
Over-the-Counter Medications
Loperamide (Imodium) is the most widely available anti-diarrheal. It slows the contractions of your intestinal muscles, giving your gut more time to absorb water. The standard approach for adults is 4 mg at the first loose stool, then 2 mg after each additional unformed stool, up to a maximum of 8 mg per day when you’re self-treating without a prescription. If diarrhea persists beyond 48 hours on loperamide, it’s generally time to try a different approach or talk to a doctor, because higher doses are unlikely to help.
Bismuth subsalicylate (Pepto-Bismol) is the other common option. It coats the lining of your stomach and intestines and has mild antimicrobial properties. One important caution: it contains a compound related to aspirin and should not be given to children or teenagers who have flu-like symptoms, because of the risk of Reye’s syndrome, a rare but serious condition affecting the liver and brain. Data on its use in children under 12 is limited overall, so other treatments are generally preferred for younger kids.
Neither medication should be used if your stools contain blood or you have a high fever, as these can be signs of a bacterial infection that needs different treatment.
Probiotics That Have Evidence Behind Them
Not all probiotics are equal when it comes to diarrhea. Two specific strains have the strongest track record. Saccharomyces boulardii (a beneficial yeast) and Lactobacillus rhamnosus GG (a bacterium) have both been shown in multiple meta-analyses to reduce the risk and duration of diarrhea, particularly the kind triggered by antibiotics. In pooled studies, each strain cut the risk of antibiotic-associated diarrhea roughly in half compared to placebo. Saccharomyces boulardii also significantly lowered the risk of C. difficile-associated diarrhea in children.
If your diarrhea started after beginning an antibiotic course, adding one of these strains is a reasonable step. Look for products that list the specific strain on the label, not just the genus and species. Generic “probiotic blend” supplements may not contain the strains that have been studied.
Caring for Children With Diarrhea
Children, especially infants and toddlers, dehydrate faster than adults. Oral rehydration solutions are the cornerstone of treatment. Offer small amounts frequently rather than waiting for the child to ask for a drink. For breastfed infants, continue breastfeeding as usual since breast milk provides both fluid and nutrients that aid recovery.
The World Health Organization recommends zinc supplementation for children with acute diarrhea: 20 mg per day for 10 to 14 days, or 10 mg per day for infants under six months. Zinc helps restore the intestinal lining and has been shown to shorten the duration of illness. This recommendation is especially relevant in low-resource settings, but zinc supplements are widely available.
Loperamide is approved for children older than 2, but dosing differs from adults, so follow package instructions carefully. Bismuth subsalicylate is best avoided in children under 12. For any child under 12 months, or any child born prematurely or with other medical conditions, contact a doctor at the first sign of diarrhea rather than managing it at home.
How to Spot Dehydration Early
Thirst is a late signal. By the time you feel noticeably thirsty, you’re already mildly dehydrated. Earlier signs include darker urine, dry lips and mouth, feeling lightheaded when standing up, and reduced urine output. In infants, look for fewer wet diapers, no tears when crying, and a sunken soft spot on the top of the head.
A simple check you can do at home is the skin turgor test. Gently pinch the skin on the back of your hand or, in a child, on the abdomen. Healthy, hydrated skin snaps back immediately (within about 1.5 seconds). If it takes longer than that to flatten, dehydration is progressing. A return time over 3 seconds suggests significant fluid loss that may need medical attention.
Warning Signs That Need Medical Attention
Most diarrhea is a nuisance, not an emergency. But certain patterns signal something more serious. In adults, contact a doctor if diarrhea lasts more than two days, you develop a high fever, you’re passing six or more loose stools a day, or you see black, tarry, or bloody stools. Severe abdominal or rectal pain, frequent vomiting that prevents you from keeping fluids down, and signs of dehydration like confusion or extreme fatigue also warrant prompt evaluation.
In children, the timeline is shorter: diarrhea lasting more than one day, any fever in infants, refusal to eat or drink for more than a few hours, or frequent watery stools all call for medical input. People who are pregnant, over 65, currently on antibiotics, or have a weakened immune system are more vulnerable to complications and should have a lower threshold for reaching out to a healthcare provider.