Most childhood diarrhea is caused by a virus and will resolve on its own, but the right steps in the first few hours can shorten its duration and prevent dehydration, which is the real danger. Vomiting often settles quickly, while diarrhea can last up to 10 days. Your main jobs are replacing lost fluids, feeding your child the right foods, and knowing which remedies actually work.
Start Replacing Fluids Immediately
Dehydration is the biggest risk when a child has diarrhea, especially in toddlers and infants. The moment loose stools begin, start offering an oral rehydration solution (ORS) like Pedialyte. These solutions contain a precise balance of salt, sugar, and minerals that plain water can’t match. For mild dehydration, aim for roughly 50 mL per kilogram of your child’s body weight over four hours. For moderate dehydration, double that to 100 mL per kilogram. After each watery stool, offer an additional 10 mL per kilogram, up to about one cup.
For a 30-pound (14 kg) child with mild dehydration, that works out to roughly 700 mL, or about 3 cups, sipped over four hours. Small, frequent sips work better than large gulps, which can trigger vomiting. If your child refuses the taste, try offering it chilled or as frozen popsicles.
If you can’t get to a store, you can make an emergency rehydration drink at home using the World Health Organization’s recipe: mix half a teaspoon of salt and two tablespoons of sugar into just over four cups of water. Stir until fully dissolved. Refrigerate and discard after 24 hours (12 hours if left at room temperature). Getting the measurements right matters. Too much salt can be harmful, and too much sugar can worsen diarrhea.
Avoid sports drinks, juice, and soda. They contain too much sugar and not enough sodium, which can actually pull more water into the intestines and make diarrhea worse.
Feed Your Child Sooner Than You Think
You may have 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 your child to just those four foods. Restricting nutrition for too long can slow recovery. Once your child’s stomach has settled even slightly, start adding more nutrient-dense options.
Good choices include brothy soups, oatmeal, boiled potatoes, crackers, unsweetened dry cereal, cooked carrots, mashed sweet potato without skin, avocado, skinless chicken or turkey, fish, and eggs. These are all easy to digest while providing the protein and calories your child needs to heal. Avoid greasy, fried, or heavily spiced foods, and skip dairy temporarily if it seems to make things worse (yogurt is often tolerated, though).
If your child is breastfeeding, continue nursing. Breast milk provides both fluids and immune factors that help fight the infection. For formula-fed babies, continue with their regular formula unless your pediatrician says otherwise.
Probiotics Can Cut Diarrhea by About a Day
One supplement with solid evidence behind it is probiotics, particularly the strain Lactobacillus rhamnosus GG (often labeled “LGG” on packaging). A meta-analysis of seven trials involving nearly 900 children found that LGG shortened diarrhea episodes by about one day on average. That may not sound dramatic, but when your child is miserable and you’re on day three, shaving off a full day matters.
The key is dosage. Research shows that probiotic effectiveness scales directly with the amount given, and the minimum effective dose is at least 10 billion colony-forming units (CFUs) per day. Check the label carefully, as many children’s probiotic products contain far less than this. Look for products specifically listing LGG and providing at least 10 billion CFUs per serving. Probiotics work best when started early in the illness.
Zinc Supplements for Children Over Six Months
The World Health Organization recommends zinc supplementation alongside oral rehydration for managing diarrhea in children. The recommended dose is 20 mg per day for 10 to 14 days for children over six months, and 10 mg per day for infants under six months. Zinc helps the intestinal lining repair itself and can reduce both the severity and duration of the episode. Zinc supplements for children are available as dissolvable tablets or syrups at most pharmacies.
Skip the Anti-Diarrheal Medications
It’s tempting to reach for something that stops the diarrhea outright, but most over-the-counter anti-diarrheal medications are not safe for young children. Loperamide (the active ingredient in Imodium) should never be given to children under two, and even for older children, safety and efficacy haven’t been well established. Bismuth subsalicylate (found in Pepto-Bismol) carries a risk of Reye’s syndrome in children and is generally not recommended for kids.
Diarrhea is actually your child’s body flushing out the infection. Suppressing it with medication can trap the virus or bacteria inside the gut longer. Focus on managing symptoms and preventing dehydration rather than trying to stop the diarrhea itself.
What the Recovery Timeline Looks Like
Most viral diarrhea in children follows a predictable pattern. Vomiting, if present, usually stops within one to two days. Diarrhea takes longer, often lasting five to seven days, though it can stretch to 10 days in some cases. The stools gradually become less watery and less frequent. Bacterial infections like salmonella can take a similar or slightly longer course, though they sometimes produce bloody stools or high fever, which warrant a call to your pediatrician.
Watch for signs of dehydration throughout the illness: fewer wet diapers than usual (fewer than six per day in infants), no tears when crying, a dry mouth, sunken eyes, or unusual drowsiness. In older children, dark-colored urine or going more than eight hours without urinating are red flags. Mild dehydration can be managed at home with ORS, but moderate to severe dehydration may need medical attention.
A Quick Action Plan
- First few hours: Start oral rehydration solution in small, frequent sips. Begin a probiotic with at least 10 billion CFUs.
- Within 24 hours: Reintroduce bland, easy-to-digest foods. Don’t wait until diarrhea stops completely to start feeding.
- Days 1 through 14: Give zinc supplements daily (20 mg for kids over six months, 10 mg for younger infants).
- Throughout: Avoid juice, soda, and sports drinks. Skip anti-diarrheal medications. Continue breastfeeding or formula as normal.