Most cases of diarrhea clear up on their own within two to three days with the right combination of fluids, easy-to-digest foods, and, when needed, over-the-counter medication. The priority during any bout is replacing lost fluids and electrolytes, because dehydration is the main risk, not the diarrhea itself. Here’s what actually works to speed recovery and feel better faster.
Fluids and Electrolytes Come First
Every loose stool pulls water and minerals out of your body. If you do nothing else, focus on drinking enough to replace what you’re losing. Water is a start, but it doesn’t contain the sodium, potassium, and glucose your body needs to absorb fluid efficiently. Oral rehydration solutions (sold at most pharmacies) are the gold standard for this. Broth-based soups are another practical option since they deliver both fluid and salt in a form that’s easy on the stomach.
Signs that dehydration is setting in include extreme thirst, dark-colored urine, dizziness, fatigue, and urinating much less than usual. In infants and toddlers, look for no wet diapers for three or more hours, no tears when crying, or unusual drowsiness. If you notice any of these, act quickly to increase fluid intake.
What to Eat During Recovery
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 reason to limit yourself to just those four foods. Brothy soups, oatmeal, boiled potatoes, crackers, and unsweetened dry cereals are all easy to digest and equally gentle on your gut.
Once your stomach starts to settle, shift toward more nutritious options so your body has what it needs to recover. Cooked squash (butternut or pumpkin), cooked carrots, sweet potatoes without skin, avocado, skinless chicken or turkey, fish, and eggs are all bland enough to tolerate while supplying protein and essential nutrients that plain toast can’t provide.
Soluble fiber deserves a special mention. It dissolves in water and forms a gel-like material in your digestive tract, which absorbs excess fluid and helps firm up loose stools. Good sources include oats, bananas, avocados, carrots, and applesauce. Add these gradually as your appetite returns.
Foods and Drinks That Make It Worse
Certain foods actively pull water into the intestines or speed up gut contractions, which is the opposite of what you want. Avoid these until you’re fully recovered:
- Caffeine: Coffee, tea, cola, and chocolate all stimulate the gut and can increase the frequency of loose stools.
- Dairy: Milk, cheese, and ice cream can cause gas, bloating, and worsened diarrhea, especially if you have any degree of lactose intolerance (which temporarily worsens during a gut infection).
- High-fructose foods: Soft drinks, commercially prepared sweets, and even naturally high-fructose fruits like apples, pears, and dried fruits can trigger the same kind of osmotic effect as undigested lactose, pulling more water into the bowel.
- Sugar-free gum and candy: Artificial sweeteners like sorbitol and xylitol are well-known causes of diarrhea on their own.
- Carbonated drinks: The fizz produces gas in the GI tract, adding bloating and discomfort on top of existing symptoms.
- Cruciferous vegetables: Broccoli, Brussels sprouts, and beans generate gas and can increase cramping.
Over-the-Counter Medications
Loperamide (the active ingredient in Imodium) works by slowing down intestinal movements, giving your gut more time to absorb water from stool. For adults, the maximum dose is 16 mg per day in capsule form or 8 mg per day in tablet form. It’s effective for acute episodes and provides relief within an hour or two for most people.
Bismuth subsalicylate (Pepto-Bismol) takes a different approach. It reduces inflammation in the gut lining and has mild antimicrobial properties. It’s a solid choice for traveler’s diarrhea or mild food poisoning. Keep in mind that it can temporarily turn your tongue and stool black, which is harmless but startling if you’re not expecting it.
Neither medication should be used if you have bloody stools or a high fever, since those signs suggest a bacterial infection that may need different treatment.
Probiotics for Faster Recovery
Specific probiotic strains can shorten the duration of diarrhea, particularly when the cause is viral. The strains with the strongest evidence are Lactobacillus GG (often sold as LGG), Lactobacillus reuteri, and Saccharomyces boulardii (a beneficial yeast rather than a bacterium). These appear to work by boosting the immune response in the gut lining.
Saccharomyces boulardii is especially worth knowing about because it’s resistant to antibiotics, making it the go-to option if your diarrhea is a side effect of antibiotic use. Look for supplements that list a specific strain name on the label, not just a generic “probiotic blend.” Dosing varies by product, so follow the label instructions.
Zinc Can Help in Children
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 reduces the duration and severity of episodes and may lower the risk of recurrence in the following two to three months. This recommendation is primarily targeted at children in resource-limited settings, but it’s a safe and inexpensive option worth discussing with a pediatrician.
Warning Signs That Need Medical Attention
Most diarrhea is a nuisance, not a danger. But certain red flags mean something more serious could be going on:
- Duration: Diarrhea lasting more than two days in adults, or more than one day in infants and young children.
- Stool appearance: Black, tarry stools or stools containing red blood or pus.
- Severe symptoms: High fever, intense abdominal or rectal pain, frequent vomiting, or six or more loose stools per day.
- Mental state changes: Unusual irritability, confusion, or lack of energy, especially in children.
People who are pregnant, over 65, currently on antibiotics, or have a weakened immune system are more vulnerable to complications and should stay in contact with their doctor during any episode. For infants under 12 months, premature babies, or children with existing medical conditions, seek help promptly rather than waiting to see if it resolves.