Water brash is a mixture of spit and stomach acid that can cause an unpleasant, sour taste in your mouth. It’s one possible symptom of chronic acid reflux (GERD). Managing GERD can prevent you from experiencing water brash. Lifestyle changes and medicines that reduce or neutralize stomach acid (like antacids and PPIs) can help.
Water brash is a symptom of gastroesophageal reflux disease (GERD). With GERD, stomach acid rises from your stomach and flows into your esophagus and mouth. If you have water brash, your salivary glands work overtime producing excessive saliva (spit) while the acid rises. While there isn’t a set amount of spit, some people with water brash salivate up to 10 milliliters (2 teaspoons) per minute.
When the saliva and stomach acid mix in your mouth, it may feel like there’s liquid stuck in the back of your throat. You may notice a sour or acidic taste in your mouth.
Other names for water brash include acid brash, pyrosis idiopathica and hypersalivation.
Water brash is one potential GERD symptom. You may experience water brash alongside other GERD symptoms, including:
Some people mistake regurgitation for water brash, but they’re two different things. With regurgitation, some of your stomach contents come back up in your throat. Water brash involves excess saliva production. Regurgitation is a more common GERD symptom than water brash.
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The changes in your body that cause GERD also lead to symptoms like water brash.
GERD symptoms occur when stomach acid flows upward into your esophagus. For this to happen, the acid has to seep past a valve at the bottom of your esophagus called the lower esophageal sphincter (LES). When things are working right, the valve opens to allow food to pass into your stomach and seals shut to prevent acid from rising.
But, if your LES is weak, injured or too relaxed, stomach acid can slip past it. When the highly acidic fluid comes into contact with the sensitive tissue in your throat, the results can feel like burning (heartburn). The process can trigger unpleasant responses like regurgitation or water brash.
Experts continue to research what causes the overproduction of saliva in people who experience water brash. The acid in your esophagus may trigger your salivary glands to produce more spit. This is called the esophago-salivary reflex. Since saliva is mostly water, it may be your body’s attempt to neutralize (dilute) the acid in your mouth and throat.
But not everyone with GERD experiences water brash.
Research is ongoing to determine the processes that cause some people with GERD to produce excess spit while others don’t.
Treatments for water brash are the same as with GERD. Typically, you can treat water brash at home by adjusting your lifestyle or taking medicines to treat GERD.
Lifestyle adjustments you can make include:
Your healthcare provider may recommend medications that neutralize or reduce stomach acid production. Medications include:
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There aren’t specific foods or drinks that cause water brash or GERD. Still, foods that may cause your LES to relax or that take longer to digest increase the likelihood you’ll experience symptoms.
If you’re experiencing discomfort from GERD symptoms, you may want to avoid:
But everyone’s experience is different. Keep track of the foods that cause you to experience water brash, and try to avoid them.
If you’re experiencing symptoms and need relief fast:
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The same strategies that help manage GERD can reduce your risk of experiencing water brash. Ask your healthcare provider if you need prescription medicines to reduce GERD-related symptoms.
If you’re experiencing symptoms of acid reflux, including water brash, for two or more weeks, it’s time to reach out to your provider. Water brash alone isn’t dangerous, but the condition that causes it (GERD) can do long-term damage to your esophagus without treatment.
A note from Cleveland Clinic
Water brash, heartburn and regurgitation are all symptoms of GERD, the chronic form of acid reflux. As unpleasant as these symptoms feel, they’re usually manageable with lifestyle changes and medications. Most people find relief by taking medications and changing their eating habits. Your healthcare provider can advise you on the best treatment plan.
Last reviewed on 01/22/2024.
Learn more about the Health Library and our editorial process.
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Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy