Does Drinking Water Help an Upset Stomach? What Experts Say

January 6, 2026 •

4 min read

According to gastroenterology experts, dehydration can worsen digestive issues like bloating and cramping, and is a significant factor during illness. So, does drinking water help an upset stomach? For most, staying properly hydrated is a cornerstone of recovery, playing a critical role in soothing discomfort and supporting normal digestive function.

Quick Summary

Hydration is crucial for digestive health and can help soothe an upset stomach by supporting normal function. Dehydration often worsens cramps and nausea, so small, frequent sips of water are key to rehydration and relief.

Key Points

Hydration is Vital: Proper fluid intake is essential to help your body manage digestive issues and avoid dehydration, especially with vomiting or diarrhea.
Soothes Discomfort: Drinking water can help dilute stomach acid and support normal digestive function, offering relief from irritation and cramping.
Combat Dehydration: Dehydration can worsen digestive problems, creating a cycle of discomfort; regular sips of water help break this cycle.
Sip Slowly: For an upset stomach, it's best to take small, frequent sips of water or chew ice chips rather than drinking large amounts at once.
Warm Water May Help: Some people find that warm water or gentle herbal teas are more soothing to the stomach lining than cold water.
Avoid Irritants: Steer clear of dehydrating and irritating liquids like alcohol, caffeine, and acidic juices when your stomach is upset.
Recognize Severe Signs: While water helps, be aware of when to seek medical attention for severe pain, prolonged symptoms, or signs of severe dehydration.

The Crucial Link Between Hydration and Digestive Health

When you have an upset stomach, your body's natural processes are disrupted. Whether caused by indigestion, a stomach virus, or a bacterial infection, the digestive system struggles to function efficiently. This is where proper hydration becomes vital. Your body is composed of approximately 60% water, and this fluid is essential for nearly all bodily functions, including digestion. When you're unwell and losing fluids through vomiting or diarrhea, replenishing that water is the first step toward recovery.

The Science of Dehydration and Upset Stomachs

Dehydration is a vicious cycle during a stomach illness. The loss of fluids makes it harder for your body to produce the necessary digestive juices and saliva, slowing down the digestive process. This sluggishness can lead to increased bloating, cramping, and general discomfort. A lack of proper hydration also affects electrolyte balance, which can cause muscles in the digestive tract to contract irregularly, leading to more painful spasms and irregular bowel movements. Simply put, staying hydrated ensures your gut has the fluid it needs to work properly, preventing symptoms from escalating.

How Water Provides Relief

Drinking water offers several key benefits for an upset stomach:

Aids Nutrient Absorption: Water is necessary to absorb nutrients from any food or drink you consume, helping your body recover more efficiently.
Flushes Out Toxins: By supporting kidney function, proper hydration helps the body eliminate toxins and waste products more effectively.
Dilutes Stomach Acid: For upset stomachs caused by indigestion or acidity, water can help dilute excess stomach acid, providing relief from burning and irritation.
Prevents Constipation: If your upset stomach involves constipation, sufficient water intake can soften stools and aid bowel movements.

The Best Way to Rehydrate

For an upset stomach, the method of hydration is as important as the fluids themselves. Experts recommend following a few simple steps:

Start with Sips: If you've been vomiting, start with small sips of water or even just sucking on ice chips. This prevents overwhelming your stomach and triggering more nausea.
Gradual Increase: Gradually increase the amount you drink as you feel better, aiming for frequent, small amounts throughout the day.
Consider Temperature: While any water is better than none, some people find that warm water is particularly soothing to the digestive system.

Comparison of Liquids for an Upset Stomach


Type of Drink	Benefits	Cautions	Best For	What to Avoid
Plain Water	Essential for rehydration, aids basic digestion.	Can cause discomfort if consumed too quickly when dehydrated.	General rehydration, mild indigestion.	Chugging large amounts.
Herbal Tea	Calming properties, can reduce nausea and gas.	Some teas (e.g., strong black tea) contain caffeine.	Nausea, bloating (ginger, peppermint).	Caffeinated teas.
Broth (Clear)	Provides hydration and electrolytes (sodium).	High-sodium options can be problematic.	Restoring electrolytes after vomiting or diarrhea.	Creamy or fatty broths.
Sports Drinks	Replenish electrolytes quickly.	High in sugar and artificial ingredients.	Severe dehydration due to vomiting/diarrhea.	Consuming excessively due to sugar content.
Diluted Juice	Source of potassium and fluid.	Avoid acidic juices like citrus.	Replacing electrolytes, especially potassium.	Concentrated, highly acidic juices.

Drinks and Foods to Avoid

When your stomach is sensitive, certain items can cause further irritation and discomfort. It's best to steer clear of these until you feel better:

Alcohol and Caffeine: These substances can irritate the stomach lining and act as diuretics, which will worsen dehydration.
High-Fat and Fried Foods: These are difficult for a weakened digestive system to process and can prolong your symptoms.
Acidic Foods and Drinks: Citrus juices and other acidic items can aggravate heartburn and indigestion.
Full-Fat Dairy: Many people find dairy products difficult to digest when sick, especially if lactose intolerant.
Carbonated Beverages: The bubbles can cause bloating and gas, adding to your discomfort.

When to Seek Medical Advice

While water is a helpful home remedy for minor stomach issues, it's not a substitute for medical care in more serious situations. Seek immediate medical attention if you experience:

Persistent or severe abdominal pain
High fever
Vomiting that lasts more than 24 hours
Diarrhea lasting more than 48 hours
Signs of severe dehydration (e.g., extreme thirst, dizziness, rapid heart rate, confusion)

For more detailed information on signs of severe dehydration, you can consult sources like the NHS inform website.

Conclusion

Drinking water is undeniably beneficial for an upset stomach. It helps prevent and combat dehydration, aids in digestion, and can soothe certain symptoms. The key is to sip it slowly and consistently, especially after a bout of vomiting or diarrhea. By combining water with other clear, gentle fluids like herbal tea and broth, you can support your body's recovery. However, always be mindful of more severe symptoms and don't hesitate to seek professional medical help if needed.

Frequently Asked Questions

The best approach is to take small, frequent sips of water rather than drinking a large amount at once. If you've been vomiting, start with ice chips or very small amounts to avoid further irritation.

The temperature of the water can be a matter of personal preference, but some people find that warm water or herbal teas are more soothing to a sensitive stomach. However, cold water is also effective for rehydration if you tolerate it well.

Besides plain water, other beneficial liquids include clear broths, diluted fruit juices (avoiding acidic citrus), and herbal teas like ginger or peppermint. These can help replenish electrolytes and soothe the digestive tract.

You should avoid alcohol, caffeinated beverages, acidic juices (like orange and grapefruit), and full-fat dairy products. These can further irritate the stomach lining and interfere with hydration.

Yes, dehydration can directly cause or worsen an upset stomach. It can lead to slowed digestion, cramping, bloating, and nausea, as your body pulls water from the gut for other vital functions.

You should seek medical attention if your symptoms are severe, persistent, or accompanied by a high fever. Also consult a doctor if you have prolonged vomiting or diarrhea or experience signs of severe dehydration.

Yes, drinking too much water too quickly can sometimes overwhelm a sensitive or upset stomach, leading to further discomfort or triggering nausea. This is why small, frequent sips are recommended instead of chugging large quantities.