The most important thing to give a 6-year-old with diarrhea is fluid, not medication. Most childhood diarrhea is caused by a virus, resolves on its own within a few days, and doesn’t need any prescription treatment. Your job is to keep your child hydrated, feed them appropriately, and watch for signs that things aren’t improving.
Fluids Come First
Children lose water and essential minerals fast when they have diarrhea, and a 6-year-old can become dehydrated more quickly than an adult. An oral rehydration solution (like Pedialyte) is the gold standard because it replaces both water and the salts your child is losing. For mild dehydration, the general guideline is about 50 mL per kilogram of body weight over four hours. For a 6-year-old weighing around 20 kilograms (44 pounds), that works out to roughly a liter sipped over four hours. For each additional loose stool, offer an extra 10 mL per kilogram, up to about 240 mL (one cup).
If your child is vomiting or refusing to drink, start very small: about a teaspoon (5 mL) every five minutes, then gradually increase as they tolerate it. Small, frequent sips work far better than handing them a full cup and hoping for the best.
Plain water is fine in small amounts, but it doesn’t replace lost electrolytes. Avoid apple juice, full-strength fruit juices, and sugary drinks. The high sugar content can actually pull more water into the intestines and make diarrhea worse. Carbonated drinks and anything with caffeine should also be off the table.
What to Feed Your Child
You may have heard of the BRAT diet (bananas, rice, applesauce, toast), but current medical thinking is that it’s too restrictive. A child with diarrhea still needs calories and nutrition to recover. Once your child can keep fluids down, resume a normal, age-appropriate diet. Starchy foods like bread, rice, pasta, and potatoes tend to be well tolerated. Lean proteins, cooked vegetables, and fruits like bananas are all reasonable choices.
The one category to watch is dairy. If milk or cheese seems to make the diarrhea worse or causes extra gas and bloating, cut back on it temporarily. Some children develop a short-lived difficulty digesting lactose during a bout of stomach illness. This usually resolves once the gut heals. Yogurt is often better tolerated than milk because the bacteria in it have already partially broken down the lactose.
Skip the OTC Anti-Diarrheal Medications
Most over-the-counter anti-diarrheal products are not safe for a 6-year-old. Bismuth subsalicylate (the active ingredient in Pepto-Bismol and Kaopectate) should not be used in children under 12. It contains a compound related to aspirin, which carries a risk of Reye’s syndrome in children recovering from viral illness. Children are also more sensitive to its side effects, especially when they’re already losing fluids.
Loperamide (Imodium) is another adult standby that is not recommended for young children. It works by slowing gut movement, which can trap harmful bacteria or viruses inside the intestines and potentially cause dangerous complications. The diarrhea itself is your child’s body flushing out whatever is causing the problem, and in most cases, letting it run its course is the safer approach.
Probiotics Can Help
Certain probiotic strains have good evidence behind them for shortening the duration of childhood diarrhea. The two most studied are Lactobacillus rhamnosus GG and Saccharomyces boulardii. Both have been shown to reduce how long a diarrheal episode lasts when given within the first day or two of symptoms.
For acute diarrhea, Lactobacillus rhamnosus GG is typically given at a dose of about 10 billion colony-forming units per day for five to seven days. Saccharomyces boulardii is usually given at 250 to 750 mg per day for the same duration. These are available over the counter in child-friendly forms like chewables or powders you can mix into food. Look for products that list the specific strain on the label, not just a generic “probiotic blend.”
If your child’s diarrhea was triggered by antibiotics, the same two strains are the best-supported options for prevention and treatment. Starting a probiotic at the beginning of an antibiotic course and continuing for a few days after can reduce the chances of antibiotic-associated diarrhea significantly.
Zinc Supplementation
The World Health Organization recommends 20 mg of zinc per day for 10 to 14 days for children over six months with diarrhea. Zinc helps the intestinal lining repair itself and can reduce both the severity and duration of the episode. This recommendation is especially emphasized in developing countries where zinc deficiency is common, but it’s a safe and inexpensive option regardless of where you live. Zinc supplements for children are available as dissolvable tablets or syrups.
How Long Diarrhea Typically Lasts
Viral diarrhea, the most common kind in children, usually resolves within a week, though it can occasionally last up to 14 days. The worst of it is often in the first two to three days, with stools gradually becoming more formed after that. Three or more loose or watery stools per day is the standard threshold for what counts as diarrhea. As long as your child is drinking, eating at least some food, and staying active, a few days of loose stools is not cause for alarm.
Signs That Need Medical Attention
While most cases resolve at home, certain signs mean your child needs to be seen by a doctor promptly:
- Diarrhea lasting more than 24 hours with no improvement, especially if your child can’t keep fluids down
- Blood or mucus in the stool, which can indicate a bacterial infection that may need treatment
- Fever of 102°F (39°C) or higher
- Unusual sleepiness, irritability, or confusion
- Signs of dehydration: no tears when crying, dry mouth, no urine for six to eight hours, or sunken-looking eyes
- Black stool, which can signal bleeding higher up in the digestive tract
If diarrhea continues beyond 14 days, a stool culture or further testing may be needed to rule out a bacterial cause or another underlying issue. Trust your instincts. If something feels off about how your child looks or acts, that’s reason enough to call.