Most cases of diarrhea resolve on their own in less than a week, but what you do during that window matters. The right fluids, foods, and rest can shorten your misery and prevent complications like dehydration. Here’s how to move through recovery as quickly and safely as possible.
Rehydration Comes First
Diarrhea pulls water and electrolytes out of your body far faster than normal. Replacing those losses is the single most important thing you can do. Plain water helps, but it doesn’t contain the salts and sugars your intestines need to absorb fluid efficiently. A simple oral rehydration solution works better: mix half a teaspoon of table salt and two tablespoons of sugar into four cups of water. The combination of salt and glucose activates a specific transport pathway in the gut lining that pulls water into your bloodstream even while your intestines are inflamed.
Sip small amounts frequently rather than gulping large volumes, which can trigger more cramping. If you can’t stomach the homemade version, commercial rehydration drinks or pediatric electrolyte solutions are widely available. Sports drinks are a distant third choice because they contain more sugar and less sodium than ideal, but they’re better than nothing.
Watch your urine color as a rough gauge. Pale yellow means you’re keeping up. Dark yellow or amber means you’re falling behind. Other signs of worsening dehydration include extreme thirst, dizziness, confusion, and skin that stays pinched or tented for a moment when you pull it up on the back of your hand instead of flattening immediately.
What to Eat (and What to Skip)
You may have heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s been a home remedy for decades, but no clinical trials have ever tested whether it actually works. Nutrition experts now discourage it because it’s extremely low in protein, fat, fiber, and several essential vitamins. Sticking to it for more than a day or two can actually slow your recovery by depriving your body of the building blocks it needs to repair your gut lining.
The current guidance from the World Health Organization, the CDC, and the American Academy of Pediatrics is straightforward: eat a normal, balanced diet as soon as you’re able to keep food down. Choose foods that are easy on your stomach but nutritionally complete. Good options include:
- Lean proteins: chicken, fish, eggs, or tofu
- Cooked vegetables: carrots, potatoes, squash
- Simple starches: rice, oatmeal, plain pasta, bread
- Fruits: bananas and peeled apples are gentle choices, but most fruit is fine if tolerated
What you avoid matters just as much. Caffeine stimulates the muscles in your intestinal wall, which can speed up transit and worsen loose stools. Dairy can be temporarily harder to digest because diarrhea sometimes strips away the enzymes on your gut lining that break down lactose. Sugar alcohols (found in sugar-free gum, candy, and some protein bars, often listed as sorbitol, mannitol, or xylitol) draw extra water into the intestines and can keep things watery. Greasy, fried, and heavily spiced foods are also harder for an irritated gut to process.
Probiotics Can Shorten the Episode
Taking a probiotic during a bout of diarrhea can cut the duration by roughly one day, according to multiple large analyses. The best-studied strain for this purpose is one commonly found in pharmacy-brand probiotic supplements (often labeled LGG on the package). The benefit is most pronounced when diarrhea is caused by a viral infection, where one meta-analysis of nearly 900 children found a reduction of about two days.
Probiotics work by competing with harmful bacteria for space on the gut wall, producing compounds that suppress pathogen growth, and helping restore the normal microbial balance that diarrhea disrupts. You can also get live cultures from fermented foods like yogurt (if you’re tolerating dairy), kefir, kimchi, or sauerkraut, though the doses are lower and less standardized than supplements.
Rest and Prevent Spread
Your body is fighting an infection or dealing with inflammation, and that takes energy. Rest isn’t just about comfort. Sleep is when your immune system does its most intensive repair work. Avoid strenuous exercise until your stools have normalized and you’re eating and drinking without difficulty.
If your diarrhea is caused by a virus (which is the most common cause), you’re highly contagious. Wash your hands with soap and water for at least 20 seconds after every bathroom visit. Alcohol-based hand sanitizers are a reasonable backup, but soap and water is more effective against several of the most common gut viruses. Clean bathroom surfaces, door handles, and faucet knobs frequently. You remain contagious for at least 48 hours after symptoms stop, so keep up these habits even once you’re feeling better.
How Long Recovery Takes
Acute diarrhea, the kind caused by food poisoning, a stomach virus, or a course of antibiotics, typically resolves in under a week. Most people feel significantly better within two to three days. If your symptoms persist beyond two weeks, that crosses into what’s classified as persistent diarrhea, and anything lasting four weeks or more is considered chronic. Both warrant a medical evaluation to check for underlying causes like infections that haven’t cleared, inflammatory bowel conditions, or food intolerances.
Even after the diarrhea itself stops, your gut may not feel completely normal right away. About 1 in 10 people who go through an episode of infectious diarrhea develop lingering digestive symptoms, a condition called post-infectious irritable bowel syndrome. This can include cramping, bloating, alternating loose stools and constipation, and general gut sensitivity. It usually improves gradually over weeks to months, but knowing it’s a recognized pattern can save you anxiety if your digestion stays a bit off after the acute illness resolves.
Signs That Need Medical Attention
Most diarrhea is unpleasant but self-limiting. However, certain warning signs mean your body needs more help than home care can provide:
- Blood or black color in your stool
- Fever of 102°F (39°C) or higher
- Inability to keep any fluids down
- Diarrhea lasting more than 24 hours with no improvement
- Signs of severe dehydration: confusion, rapid heart rate, sunken eyes, extreme dizziness, or very little urine output
In infants and young children, dehydration can escalate quickly. Red flags include no wet diapers for three hours, no tears when crying, a sunken soft spot on the top of the head, and unusual sleepiness or irritability. These signs call for prompt medical evaluation, not a wait-and-see approach.