Why Does My Dog Keep Gagging and Licking Their Lips?

If your dog has been lip-licking obsessively, gagging after meals, or bringing up food without warning, you’re probably already deep in a late-night Google spiral. Acid reflux in dogs is more common than most people realize, and while it’s not always an emergency, it’s also not something to brush off.

What is acid reflux in dogs?

Acid reflux happens when stomach acid flows backward up into the esophagus, the tube that connects the mouth to the stomach, irritating and sometimes damaging the lining along the way. The medical term is gastroesophageal reflux disease, or GERD.

In healthy dogs, a muscle at the bottom of the esophagus called the lower esophageal sphincter acts like a one-way valve, keeping stomach contents moving in the right direction. When that valve relaxes or weakens at the wrong moment, acid gets through. It can be a one-off thing triggered by something like anesthesia or a high-fat meal, or it can become a chronic problem that needs real management.

Acid reflux isn’t a disease on its own. It’s a symptom, and figuring out what’s causing it shapes everything about how it gets treated.

Signs of acid reflux in dogs: what to look for

Symptoms vary from dog to dog, and some are easy to miss. Here’s what to watch for:

• Excessive lip-licking or swallowing: This is often the first thing owners notice. It’s a sign of nausea or that something uncomfortable is happening in the throat.
• Regurgitation: Bringing up undigested food or liquid, usually without much warning or effort.
• Gagging or coughing: Especially after eating or when lying down, which can signal acid is creeping up.
• Reduced appetite: If eating hurts, dogs learn to avoid it.
• Weight loss: A downstream effect of eating less over time.
• Grass-eating: Dogs sometimes graze when their stomach feels off.
• Blood in vomit or regurgitated material: A more serious sign that the esophageal lining may be damaged. This needs a vet visit promptly.
• Restlessness at night: Reflux often gets worse when a dog lies down, just like in people.

Regurgitation vs. vomiting: why the difference matters

These two look similar but they’re not the same, and telling them apart helps your vet narrow down what’s going on.

Vomiting is an active process. Your dog will heave, their abdomen will contract, and they may drool or pace beforehand. What comes up usually looks digested or partially digested and often smells bad.

Regurgitation is passive. It happens suddenly, often without warning, and the material looks undigested (think: tube-shaped food that came back up whole). There’s no heaving involved. Regurgitation points more directly to an esophageal or reflux issue, while vomiting has a longer list of possible causes.

What causes acid reflux in dogs

There’s no single cause. Reflux in dogs usually comes from one of these:

• Anesthesia: One of the most common triggers. When a dog is under anesthesia, the muscle at the bottom of the esophagus (called the lower esophageal sphincter) relaxes, which can let stomach acid flow upward. Post-surgical reflux is well-documented.
• Hiatal hernia: A condition where part of the stomach pushes through the diaphragm into the chest cavity, making reflux much more likely. Some dogs are born with it; others develop it.
• Brachycephalic breeds: Flat-faced dogs like French Bulldogs, Pugs, and English Bulldogs are especially prone to acid reflux. Their anatomy creates pressure that makes the lower esophageal sphincter work harder, and it often doesn’t win.
• Diet: High-fat meals slow down stomach emptying, which means more time for acid to pool and back up.
• Stress: Chronic stress affects gut motility (how fast the digestive system moves) and can contribute to reflux over time.
• Gut microbiome imbalance: Emerging research suggests that imbalances in a dog’s gut bacteria can disrupt normal digestion and increase reflux risk. This is sometimes called dysbiosis.
• Underlying conditions: Pancreatitis, inflammatory bowel disease (IBD), and food sensitivities can all trigger or worsen reflux as a secondary effect.

Should I go to the emergency vet, or can this wait?

Monitor closely and call your vet soon if:

• Your dog has had one or two episodes of regurgitation but seems otherwise fine
• Lip-licking or gagging is occasional, not constant
• Your dog is eating and behaving normally between episodes

Call your vet and aim to be seen within 24 hours if:

• Symptoms are happening more than once or twice a week
• Your dog is eating less or losing weight
• You’ve noticed blood in what they bring up
• Your dog is a flat-faced breed and symptoms are getting worse

Go to emergency care now if:

• Your dog is breathing rapidly or with visible effort
• They’re coughing persistently alongside regurgitation
• They seem lethargic, feverish, or in pain around the chest or abdomen
• Symptoms have escalated suddenly and significantly

That last set of signs can indicate aspiration pneumonia (more on that below), which is a genuine emergency. Don’t wait for a regular appointment.

Primary vs. secondary reflux: this distinction changes everything

Most articles about dog acid reflux treat it like one thing. It’s not.

Primary reflux is when the reflux itself is the problem. The lower esophageal sphincter is weak or dysfunctional, and acid backs up without another underlying condition driving it. This is what most people picture when they think of GERD.

Secondary reflux is when something else is causing it. Pancreatitis, food allergies, IBD, stress, a hiatal hernia, or a gut microbiome imbalance can all create conditions for acid to flow the wrong direction. In these cases, treating only the reflux symptoms with antacids or prokinetics without addressing the root cause is a bit like mopping the floor while the faucet is still running. Your dog might feel better temporarily, but the problem keeps coming back.

This is exactly why diagnostics matter. If your vet suspects secondary reflux, they’ll want to investigate further before settling on a treatment plan.

How vets diagnose acid reflux in dogs

There’s no single test that confirms reflux on its own. Your vet will usually build a picture from several sources:

• Physical exam and history: Your vet will ask a lot of questions about when symptoms started, what your dog eats, and whether anything changed recently. Be as specific as you can.
• Blood and urine tests: To rule out systemic issues like pancreatitis, kidney disease, or infection.
• X-rays or ultrasound: To check for a hiatal hernia, abnormal organ positioning, or other structural issues.
• Endoscopy: A camera on a thin, flexible tube that’s guided down the throat to look directly at the esophagus and stomach lining. This is the gold standard for diagnosing reflux and esophageal damage. Endoscopy typically ranges from $800 to $3,500 or more depending on your location and whether biopsies are taken.

Treatment options for dog acid reflux

Your vet will tailor treatment to your dog’s specific situation, but here’s what the options generally look like:

Medications

• Omeprazole (a proton pump inhibitor): reduces how much acid the stomach produces, giving the esophagus a chance to heal. One of the most commonly used medications for dog acid reflux.
• Sucralfate: forms a protective barrier over irritated or ulcerated tissue in the esophagus and stomach. Often used alongside acid-reducing medications to help damaged tissue recover.
• Prokinetics: help speed up stomach emptying so there’s less acid sitting around to back up. Metoclopramide is one commonly used option; cisapride is another that some vets prefer for its effect on the lower esophageal sphincter specifically.
• Antacids: sometimes used for short-term relief, but usually not the main treatment for chronic reflux.usually not the main treatment for chronic reflux in dogs.

Diet changes

A low-fat diet is almost always part of the plan. High-fat foods slow gastric emptying, meaning food sits in the stomach longer and creates more opportunity for acid to backflow. Your vet may recommend a prescription food or a specific diet. Feeding smaller, more frequent meals rather than one or two large ones can also reduce pressure on the lower esophageal sphincter.

Surgery

Rarely needed, but if your dog has a hiatal hernia causing persistent, severe reflux, surgical correction may be the most effective long-term solution. This is a conversation for a veterinary surgeon if medical management isn’t working.

The complication no one wants to talk about: aspiration pneumonia

When stomach contents are regurgitated and accidentally inhaled into the lungs, it causes aspiration pneumonia, a serious bacterial infection of the lung tissue. It’s a real risk in dogs with chronic, untreated reflux.

Signs that your dog may have developed aspiration pneumonia include rapid or labored breathing, persistent coughing, lethargy, and fever. This is an emergency. Aspiration pneumonia requires hospitalization, IV antibiotics, and sometimes oxygen support. Treatment costs often run into several thousand dollars, and more in severe cases.

This is one of the clearest reasons not to wait and see when reflux symptoms are persistent. The longer the esophagus is exposed to acid without treatment, the higher the risk of this complication developing.

When to call your vet

If your dog has had one episode of regurgitation and seems totally fine otherwise, you can monitor them closely. But call your vet if:

• Symptoms happen more than once or twice a week
• Your dog is losing weight or refusing to eat
• You see blood in what they bring up
• They’re coughing or breathing differently than usual
• They seem in pain, especially around the chest or abdomen
• Your dog is a flat-faced breed and symptoms are getting worse

And if your dog is showing signs of breathing difficulty alongside regurgitation, go straight to an emergency vet. Don’t wait for a regular appointment.

What’s the outlook for dogs with acid reflux?

For most dogs, the prognosis is good. Primary reflux often responds well to medication and dietary changes, and many dogs manage it long-term without major complications. Secondary reflux depends heavily on what’s causing it. Treat the underlying condition effectively, and the reflux often improves significantly.

Dogs with hiatal hernias or brachycephalic anatomy may need more intensive, ongoing management. Dogs who develop aspiration pneumonia face a more serious road, but with prompt treatment, many recover fully.

How your dog does depends a lot on how quickly the problem is caught and how consistently it’s managed. That’s not meant to alarm you. It’s a good reason to take those lip-licking episodes seriously.

Does pet insurance cover acid reflux in dogs?

Diagnostics and treatment for acid reflux can add up fast, especially if your dog needs an endoscopy, prescription medications, or emergency care for aspiration pneumonia.

If your dog develops acid reflux after your Lemonade Pet policy is active, a base accident and illness policy can help cover eligible costs including vet visits, diagnostics like endoscopy, and prescription medications, as long as the condition isn’t pre-existing and develops after the 14-day illness waiting period has passed. It’s worth knowing that complications arising from a pre-existing condition are also excluded, so getting coverage in place while your dog is healthy is what makes it genuinely useful.

Once a condition is diagnosed or shows symptoms, it may be considered pre-existing and excluded from coverage going forward. Some curable conditions may regain eligibility after 12 months without symptoms or treatment. Your policy details are the best place to confirm what applies to your dog’s situation.

Before we go

Watching your dog gag, lick their lips compulsively, or bring up food is genuinely unsettling. The good news is that acid reflux in dogs is manageable in most cases, especially when it’s caught before complications develop. Work with your vet to figure out whether it’s primary reflux or something driving it from underneath, make the dietary adjustments they recommend, and keep a close eye on things.

Frequently Asked Questions

A few quick words, because we <3 our lawyers: This post is general in nature, and any statement in it doesn’t alter the terms, conditions, exclusions, or limitations of the policies issued, which differ according to your state of residence. You’re encouraged to discuss your specific circumstances with your own professional advisors. The purpose of this post is merely to provide you with info and insights you can use to make such discussions more productive! Naturally, all comments by, or references to, third parties represent their own views, and Lemonade assumes no responsibility for them. Coverage may not be available in all states. Please note that statements about coverages, policy management, claims processes, Giveback, and customer support apply to policies underwritten by Lemonade Insurance Company or Metromile Insurance Company, a Lemonade company, sold by Lemonade Insurance Agency, LLC.  The statements do not apply to policies underwritten by other carriers.