After a bout of diarrhea, your body needs fluids, the right foods, and time to restore normal digestion. Most people return to normal bowel movements within one to two weeks, though the active diarrhea itself usually resolves in one to three days. What you do in that recovery window makes a real difference in how quickly you feel like yourself again.
Rehydrate Before Anything Else
Diarrhea strips your body of water and electrolytes, and replacing them is the single most important recovery step. Plain water helps, but it doesn’t contain the sodium and potassium your gut lost. Oral rehydration solutions (available at any pharmacy) are the gold standard because they contain the right balance of salts and sugars to help your intestines absorb fluid efficiently. Sports drinks are a decent backup, though they tend to have more sugar and less sodium than ideal.
Sip steadily rather than gulping large amounts at once. If you’re still having loose stools, aim to drink an extra cup of fluid for each episode. Signs you’re getting dehydrated include dark urine, dry mouth, dizziness when standing, and feeling unusually tired. Children, older adults, and anyone with a weakened immune system are especially vulnerable to dehydration and need closer attention.
Hydration for Children
Kids dehydrate faster than adults. For a mildly dehydrated child, CDC guidelines recommend about 50 mL of oral rehydration solution per kilogram of body weight over two to four hours. For moderate dehydration, that doubles to 100 mL per kilogram over the same window. After the initial rehydration, replacing roughly 10 mL per kilogram for each additional loose stool helps keep up with ongoing losses. Pedialyte or similar pediatric rehydration drinks are easier on small stomachs than homemade solutions.
What to Eat During Recovery
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. These foods are easy to digest and unlikely to irritate your gut, but they’re also nutritionally thin. A better approach is to use BRAT foods as a starting point and gradually expand. Within the first day or two after diarrhea stops, try adding lean proteins like baked chicken, eggs, or fish. Cooked vegetables, oatmeal, and simple soups are also gentle choices that provide more of what your body needs to recover.
Eat smaller meals more frequently rather than three large ones. Your digestive system is still rebuilding, and smaller portions put less strain on it.
Foods and Drinks to Avoid
Some things will slow your recovery or trigger a relapse. For the first week or so, steer clear of:
- Dairy products. Diarrhea, especially from a viral infection, can temporarily damage the cells lining your small intestine that produce the enzyme needed to digest lactose. This means milk, cheese, and ice cream may cause bloating, gas, and more loose stools even after the infection is gone. This temporary lactose sensitivity typically lasts two to four weeks before those cells regenerate.
- Fatty or fried foods. High-fat meals are harder to digest under normal circumstances. A recovering gut handles them even worse.
- Caffeine and alcohol. Both are mild diuretics that can worsen dehydration. Coffee also stimulates gut contractions.
- Sugar-heavy foods and drinks. Large amounts of sugar can draw water into the intestines and loosen stools, the opposite of what you want.
- Spicy foods and raw vegetables. These can irritate an already sensitive digestive tract.
Restoring Your Gut Bacteria
Diarrhea disrupts the community of beneficial bacteria in your intestines. This is one reason bowel habits can stay irregular for up to 14 days even after the infection clears. Probiotics can help speed that recovery.
Two strains have the strongest evidence behind them. Saccharomyces boulardii, a beneficial yeast, significantly shortened diarrhea duration in hospitalized children receiving antibiotics, cutting it from an average of 9 days down to 2.3 days. Lactobacillus rhamnosus GG has shown more mixed results, with some trials finding it reduced diarrhea by about two days and others showing no significant benefit. A dose range of 5 to 40 billion colony-forming units per day appears effective with rare side effects, according to a review from the American Academy of Family Physicians.
You can get probiotics from supplements or from fermented foods like yogurt (if you’re tolerating dairy), kefir, sauerkraut, and kimchi. If your diarrhea was caused by antibiotics, S. boulardii is a particularly good choice because, as a yeast rather than a bacterium, antibiotics don’t kill it.
When to Stop Anti-Diarrheal Medication
Over-the-counter anti-diarrheal medications containing loperamide (the active ingredient in Imodium) can provide relief during acute episodes, but they aren’t meant for extended use. For acute diarrhea, you should not take loperamide for more than two days. The maximum safe dose for adults using tablets is 8 mg (four tablets) in any 24-hour period.
These medications work by slowing gut contractions, which reduces the frequency of loose stools. But if your diarrhea is caused by a bacterial infection, slowing things down can actually keep the pathogen in your system longer. If diarrhea hasn’t improved after two days of loperamide, that’s a sign something else is going on.
Warning Signs That Need Medical Attention
Most diarrhea resolves on its own, but certain symptoms signal something more serious:
- Duration. Diarrhea lasting more than two days in adults, or more than 24 hours in children.
- Fever of 102°F or higher.
- Blood or pus in your stool.
- Black, tarry stools (which can indicate bleeding higher in the digestive tract).
- Severe abdominal or rectal pain.
- Signs of dehydration that aren’t improving with oral fluids, such as no urination for several hours, sunken eyes, or confusion.
A Realistic Recovery Timeline
Active diarrhea from a stomach bug typically lasts one to three days. Looser-than-normal stools can linger for up to two weeks as your gut lining heals and your microbiome rebalances. Temporary lactose sensitivity may persist for two to four weeks. Energy levels often take a few days to bounce back, partly because your body lost fluids and nutrients and partly because your immune system used significant resources fighting off the infection.
During this window, prioritize sleep, keep hydrating even after you feel better, and reintroduce your normal diet gradually over the course of a week. Jumping straight back to heavy meals, dairy, and coffee on day one is one of the most common reasons people feel worse again after initially improving.