For a basic upset stomach, your best bet depends on the specific symptom bothering you most. Nausea, diarrhea, heartburn, and cramping each respond to different remedies. Most cases resolve within a day or two with the right combination of over-the-counter options, simple foods, and a few well-studied natural remedies.
Match the Remedy to Your Symptom
Not all stomach trouble is the same, and grabbing the wrong product can leave you waiting for relief that never comes. Heartburn and acid reflux call for something that neutralizes or reduces stomach acid. Nausea responds best to ginger or bismuth-based products. Diarrhea needs something that slows fluid loss in the gut. Bloating and cramping often improve with peppermint or simply resting your digestive system for a few hours. Once you identify what’s actually going on, picking the right remedy becomes straightforward.
Over-the-Counter Options
Bismuth Subsalicylate
This is the active ingredient in products like Pepto-Bismol and Kaopectate. It treats the broadest range of symptoms: diarrhea, heartburn, nausea, and general stomach discomfort. It works by reducing inflammation inside the intestine, slowing the flow of fluids into the bowel, and in some cases killing organisms that cause diarrhea. Follow the dosing instructions on the package and don’t exceed them.
One important caution: bismuth subsalicylate contains a compound related to aspirin. It should not be given to children under 12, and it should never be used for nausea or vomiting in children or teenagers who have the flu or chickenpox. In those cases, the salicylate component carries a risk of Reye’s syndrome, a rare but serious condition affecting the brain and liver. Children are also more sensitive to salicylates when they’re dehydrated from vomiting or diarrhea.
Antacids and Acid Reducers
If your main complaint is heartburn or a burning feeling in your upper stomach, calcium-based antacids (like Tums) neutralize acid quickly and can bring noticeable relief within about 15 minutes. The downside is that the effect wears off relatively fast. Acid reducers like famotidine work more slowly but last significantly longer, with relief extending past seven hours in many cases. A combination product that pairs an antacid with an acid reducer gives you the best of both: faster onset than an acid reducer alone and longer-lasting relief than an antacid alone.
Natural Remedies That Work
Ginger
Ginger is one of the most consistently supported natural remedies for nausea. It speeds up the movement of food through your digestive tract and appears to act on both the gut and the brain’s nausea center. Clinical studies have tested doses ranging from 250 mg to 2 grams per day, split into three or four doses. Interestingly, 1 gram per day worked just as well as 2 grams, so more isn’t necessarily better. You can get ginger through capsules, ginger tea, or even ginger chews. Ginger ale is a less reliable source because many commercial brands contain very little actual ginger.
Peppermint
Peppermint relaxes the smooth muscle in your digestive tract, which makes it helpful for cramping, bloating, and that uncomfortable “tight” feeling in your gut. The catch is that peppermint also relaxes the valve between your stomach and esophagus, which can worsen heartburn and acid reflux. If reflux is part of your problem, skip peppermint entirely.
Enteric-coated peppermint oil capsules solve this by passing through the stomach intact and dissolving lower in the digestive tract, where they help with cramping without triggering reflux. The studied dose is 0.2 to 0.4 mL of peppermint oil three times daily. Plain peppermint tea is a gentler option for mild discomfort, though it doesn’t bypass the upper stomach the way coated capsules do.
What to Eat (and What to Skip)
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. There aren’t any clinical studies proving it works better than other approaches, but the logic behind it is sound. Bananas and apples contain pectin, a soluble fiber that binds excess water and helps firm up loose stools. Bananas also replenish potassium, which your body loses rapidly during diarrhea or vomiting. Plain white rice is starch-heavy and converts to soluble fiber in the gut. Toast made from white bread is bland enough to stay down when your stomach is sensitive.
That said, you don’t need to limit yourself to just those four foods. Brothy soups, oatmeal, boiled potatoes, crackers, and unsweetened dry cereals are equally easy to digest and give you more nutritional variety. A day or two of bland eating is reasonable during a bout of stomach flu, food poisoning, or traveler’s diarrhea. After that, gradually reintroduce your normal diet.
While your stomach is recovering, avoid alcohol, caffeine, dairy, fatty or fried foods, and anything spicy. These all either increase acid production, irritate the stomach lining, or are harder for your gut to process when it’s already inflamed.
Probiotics for Diarrhea
If diarrhea is the dominant symptom, certain probiotic strains can meaningfully shorten your recovery time. The two with the strongest evidence are Lactobacillus rhamnosus GG and Saccharomyces boulardii (a beneficial yeast, not a bacteria). In a randomized, placebo-controlled trial, children with acute diarrhea who received S. boulardii recovered in about 66 hours compared to 95 hours in the placebo group, a difference of roughly 30 hours. They also rehydrated about 9 hours faster.
Probiotics aren’t a quick fix for nausea or heartburn, but if your upset stomach involves frequent watery stools, adding a probiotic with one of these specific strains is worth trying alongside other remedies. Look for products that list the strain name on the label, not just the species.
Staying Hydrated Matters More Than You Think
Dehydration is the most common complication of an upset stomach, especially when vomiting or diarrhea is involved. Water alone is fine for mild cases, but if you’ve been losing fluids for several hours, an oral rehydration solution or an electrolyte drink helps replace the sodium and potassium your body is burning through. Sip slowly rather than gulping. Large volumes at once can trigger more vomiting.
If you can’t keep any liquids down for more than a few hours, that changes the situation. Small ice chips or tiny sips every few minutes are worth trying before escalating to medical care.
Signs That Need Medical Attention
Most upset stomachs pass on their own. But certain patterns signal something more serious. Seek emergency care if you experience any of the following:
- Pain that starts near your belly button and moves to your lower right side, especially if it worsens when you move, cough, or take deep breaths. This pattern suggests appendicitis, where the pain typically worsens over hours and is accompanied by nausea, fever, or loss of appetite.
- Severe bloating with inability to pass gas or have a bowel movement, particularly if you’ve had abdominal surgery in the past. This could indicate a bowel obstruction.
- Upper abdominal pain that worsens after eating, paired with nausea, fever, and a rapid pulse. This pattern is consistent with acute pancreatitis.
- Sudden, intense cramping in the lower abdomen that hits maximum intensity almost immediately, similar to a severe runner’s cramp. Kidney stones often present this way.
- Inability to keep any liquids down, vomiting that won’t stop, or abdominal pain that’s noticeably different or more severe than anything you’ve experienced before.
Regular Exercise as Prevention
If you deal with recurring stomach discomfort that doesn’t have a clear cause, regular aerobic exercise is one of the few interventions recommended by gastroenterology guidelines. Walking, cycling, swimming, or any moderate cardio helps regulate gut motility and reduces the frequency of episodes. It won’t fix an acute bout of stomach flu, but as a long-term strategy for people who frequently feel bloated, crampy, or nauseated without an obvious trigger, consistent exercise makes a measurable difference.