What Causes Dogs to Lick the Air — Signs, Causes, and When to See a Vet

Dogs may lick the air for a variety of reasons, but the behavior is rarely benign. When it appears, it often signals an underlying health issue or a behavioral response that deserves attention.

Dr. Leslie Sinn, a board‑certified veterinary behaviorist in the Washington, D.C. area, explains that air licking is a classic displacement behavior—an involuntary action performed when a dog is uncertain or uncomfortable, but it has no functional purpose.

Below we explore the most common causes, warning signs to watch for, and the steps you should take if your dog begins licking the air.

Is Air Licking Normal for Dogs?

While occasional random licking is normal, persistent air licking is not. It is best viewed as a symptom rather than a standalone behavior. Just as you would seek immediate care for vomiting or diarrhea, you should investigate the cause of new or abnormal behaviors.

What Triggers Air Licking?

Several factors can prompt this behavior:

Gastrointestinal Distress

According to Dr. Christine Calder, a diplomate of the American College of Veterinary Behaviorists, the most frequent trigger is an underlying GI problem. She urges owners to seek veterinary care promptly if air licking appears.

Dr. Sinn likens the sensation to “acid reflux in dogs.” The animal may swallow or gulp air repeatedly, yet the discomfort persists. Typical accompanying signs include:

• Vomiting
• Flatulence
• Reduced appetite
• Abdominal pain
• Inconsistent stool patterns (loose or hard)

Potential diagnoses range from food allergies and intolerances to inflammatory bowel disease, intestinal parasites, gastric ulcers, exocrine pancreatic disease, and Addison’s disease. Breeds predisposed to GI issues—such as Bulldogs, Boston Terriers, Boxers, and Dachshunds—may lick the air more frequently, but the behavior itself is not breed‑specific.

Other Causes

Air licking can also stem from:

• Anxiety or stress – a coping mechanism when a dog has no other outlet.
• Syringomyelia – a rare neurological condition most common in Cavalier King Charles Spaniels, which may coexist with air licking and other neurologic signs.
• Pruritus – a dog unable to reach an itchy spot may lick the air reflexively after you scratch it.
• Behavioral routines – some dogs lick their beds, owners’ feet, or the air near bedtime as part of a settling ritual.

These secondary causes are far less common than GI issues, so ruling out digestive problems should be the first priority.

Accompanying Behaviors

Watch for grass‑eating, especially if it’s a new habit, as this often signals GI upset. Air licking near bedtime may reflect anxiety or anticipation of food, and is usually not dangerous but worth noting.

What to Do If Your Dog Keeps Licking the Air

1. Schedule a veterinary visit – Begin with a thorough physical exam and basic blood work to rule out systemic disease.

2. Initiate a limited‑ingredient diet – A hypoallergenic diet can help identify food sensitivities and reduce stomach acid.

3. Add a chemical barrier – Products like sucralfate or proton‑pump inhibitors can protect the gastric lining and lower acidity.

4. Proceed with a full GI work‑up – If symptoms persist, your vet may recommend endoscopic biopsies to pinpoint inflammation or allergy.

5. Address lingering behavior – Even after medical treatment resolves the underlying cause, air licking may persist. Work with your veterinarian or a certified animal behaviorist to implement enrichment, exercise, and, if necessary, anti‑anxiety medication.

Timely intervention is key: the longer the behavior continues, the harder it becomes to eliminate.