# Why Is My [Dog Reverse sneezing](/knowledge/veterinary-medicine/clinical-methods/dog-reverse-sneezing)? Irritation vs Respiratory Illness ## Key Takeaways - Reverse sneezing, medically termed paroxysmal respiration, is a spasmodic reflex of the soft palate and pharynx triggered by nasopharyngeal irritation, characterized by forceful inhalation through the nose, producing a distinctive snorting or honking sound. - While typically benign and self-limiting, lasting seconds to a minute, persistent or frequent reverse sneezing, especially when accompanied by nasal discharge (clear, yellow, green, or bloody), lethargy, fever, or reduced appetite, warrants veterinary investigation for underlying conditions such as allergic rhinitis, upper respiratory infections, foreign bodies, nasal mites, dental disease, or tumors. - Diagnostic modalities for differentiating irritation from illness include rhinoscopy to visualize the nasal passages for foreign objects or masses, radiography (X-rays) to assess for structural abnormalities or inflammation, and laboratory tests such as complete blood counts (CBC) and cultures to identify infectious agents. - Management strategies are etiology-dependent: irritation-induced episodes may be mitigated by environmental control and avoiding triggers like strong odors or excessive leash tension, while infections require antimicrobial therapy, allergies necessitate antihistamines or immunotherapy, and foreign bodies or tumors demand surgical or medical intervention. - Brachycephalic breeds exhibit a higher predisposition to reverse sneezing due to anatomical factors like elongated soft palates, increasing their susceptibility to airway irritation and potential complications from respiratory illnesses. - Emergency red flags necessitating immediate veterinary attention include cyanotic or pale gums, collapse, inability to breathe, continuous gagging, severe lethargy, high fever, or profuse nasal/oral bleeding, indicating acute respiratory distress or systemic compromise. --- If your [dog](/knowledge/veterinary-medicine/clinical-methods/dog) suddenly stops, extends their neck, and makes a loud snorting or honking sound while trying to inhale, you are witnessing a reverse sneeze. This common event can look alarming, but it is usually harmless. The direct answer to the question "why is my [dog reverse sneezing](/knowledge/veterinary-medicine/clinical-methods/dog-reverse-sneezing)?" is that a spasm of the soft palate and throat triggers a rapid, forceful inhalation through the nose. This is typically a response to irritation, not a sign of a serious respiratory illness. However, there are times when the same sound can indicate an underlying problem. This article explains the difference between a simple irritation episode and a true respiratory illness, and it gives you clear guidance on when to seek veterinary care. ## At a Glance: Irritation vs Respiratory Illness Use this table as a quick reference. It is not a diagnostic tool, but it helps you organize what you are seeing at home. | Feature | Reverse Sneezing (Irritation) | Respiratory Illness (Infection, Allergy, or Obstruction) | |, - |, - |, - | | **Sound** | Loud snorting or honking, occurs during inhalation | Coughing, wet or dry, often during exhalation; may include nasal congestion | | **Posture** | Standing still, neck extended, elbows out, head tilted back | Variable; may be lethargic, hunched, or reluctant to move | | **Frequency** | Episodic, often a few seconds to a minute, then stops abruptly | Persistent or recurring over hours to days | | **Nasal Discharge** | Usually none, or occasional clear fluid | Often present: clear, yellow, green, or bloody | | **Other Signs** | Dog appears normal before and after the episode | Fever, reduced appetite, lethargy, coughing, difficulty breathing, eye discharge | | **Response to Calming** | Often stops if you gently soothe the dog or cover the nostrils briefly | Does not stop with simple calming; requires veterinary assessment | | **Typical Causes** | Dust, pollen, excitement, pulling on leash, strong odors, sudden temperature change | Viral or bacterial infection, fungal infection, foreign body, nasal mites, tumors, allergies, dental disease | ## Understanding the Anatomy of a Reverse Sneeze To understand why this happens, you need to know a little about your dog's upper airway. The nasal cavity, pharynx (throat), and larynx (voice box) work together to warm, filter, and humidify the air your dog breathes. The soft palate is a muscular flap at the back of the roof of the mouth. It separates the nasal passage from the oral cavity. A reverse sneeze, medically known as paroxysmal respiration or mechanosensitive aspiration reflex, occurs when the soft palate and the muscles of the pharynx go into a spasm. This spasm narrows the opening to the trachea (windpipe). The dog responds by trying to inhale forcefully through the nose. The result is the characteristic snorting sound. Unlike a regular sneeze, which pushes air out, a reverse sneeze pulls air in. This is why it is called "reverse." This reflex is designed to clear an irritant from the nasopharynx. It is a protective mechanism. When the spasm passes, the airway opens, and the dog resumes normal breathing. The entire event typically lasts from a few seconds to one minute. Some dogs may have several episodes in a row, especially if they are excited or if the irritant persists. ## Why Is My [Dog Reverse Sneezing](/knowledge/veterinary-medicine/clinical-methods/dog-reverse-sneezing)? Common Causes of Irritation Most reverse sneezing episodes are triggered by minor, temporary irritation. These are not signs of illness. They are normal responses to the environment. ### Environmental Irritants Dust, pollen, mold spores, and household aerosols are common triggers. Cigarette smoke, perfume, cleaning products, and even scented candles can irritate the sensitive lining of the nasal passages. When your dog inhales these particles, the body initiates the reverse sneeze reflex to try to dislodge them. ### Excitement and Stress Many dogs reverse sneeze when they are overly excited. This can happen during play, when you come home, or when they anticipate a walk. The rapid, shallow breathing that accompanies excitement can irritate the throat and soft palate. Stress or anxiety can have a similar effect. The physical mechanism is the same, but the trigger is behavioral rather than environmental. ### Pulling on the Leash A collar that presses against the throat can trigger a reverse sneeze. When a dog pulls, the collar puts pressure on the trachea and the soft palate. This mechanical pressure can initiate the spasm. Using a harness instead of a collar can reduce this trigger for many dogs. ### Sudden Temperature Changes Moving from a cool, air-conditioned room to a hot, humid outdoors, or vice versa, can cause the nasal passages to react. The sudden change in temperature and humidity can be enough to set off the reflex. This is often seen in the winter when a dog goes from a warm house into cold air. ### Post-Exercise After vigorous exercise, dogs often breathe heavily and rapidly. This can dry out the nasal passages and irritate the throat. A reverse sneeze after a run or a game of fetch is not uncommon. ### Breed Predisposition Brachycephalic breeds, such as Pugs, Bulldogs, Boxers, and Shih Tzus, have a shortened skull and a relatively elongated soft palate. This anatomical arrangement makes them more prone to reverse sneezing. The soft palate is more likely to be pulled into the airway during breathing. While this is a normal anatomical variation for these breeds, it does mean they may reverse sneeze more frequently than other dogs. This breed-level information is general; it does not predict whether your individual dog will have episodes. ## When Reverse Sneezing Indicates a Respiratory Illness While irritation is the most common cause, reverse sneezing can also be a symptom of an underlying respiratory condition. You need to distinguish between a benign spasm and a disease process. ### Allergic Rhinitis Dogs can suffer from allergies just like people. Inhaled allergens such as pollen, dust mites, and mold can cause chronic inflammation of the nasal passages. This condition is called allergic rhinitis. The inflammation can trigger frequent reverse sneezing. Unlike a simple irritation episode, allergic rhinitis often comes with other signs. Your dog may have clear nasal discharge, itchy eyes, and frequent sneezing. The reverse sneezing may occur daily, especially during certain seasons. ### Upper Respiratory Infections Viral and bacterial infections can cause inflammation of the nose and throat. Canine infectious respiratory disease complex (CIRD), sometimes called "kennel cough," is a common example. While the hallmark sign is a dry, hacking cough, some dogs also develop reverse sneezing. The infection causes swelling and mucus production in the nasal passages. This can trigger the reverse sneeze reflex. If your dog has a respiratory infection, they will likely also show signs such as lethargy, reduced appetite, fever, and nasal discharge. The discharge may be clear, yellow, or green. ### Foreign Bodies Dogs are curious and often sniff or pick up objects. A grass seed, a small piece of plant material, or a tiny toy part can become lodged in the nasal passage. This is a common problem, especially in dogs that spend time outdoors in grassy or wooded areas. A foreign body causes intense, localized irritation. The dog will often reverse sneeze repeatedly in an attempt to dislodge the object. There may also be a sudden onset of nasal discharge, often from only one nostril, and the dog may paw at their nose. This is a situation that requires veterinary attention. The object will not come out on its own. ### Nasal Mites *Pneumonyssoides caninum* is a nasal mite that can infest a dog's nasal passages and sinuses. These mites cause chronic irritation and inflammation. The most common signs are reverse sneezing, sneezing, nasal discharge, and nosebleeds. Nasal mites are more common in certain regions and can affect dogs of any age. Diagnosis requires a veterinary examination, often involving a rhinoscopy (a camera inserted into the nose). ### Dental Disease The roots of the upper teeth, particularly the premolars and molars, lie very close to the nasal cavity. A severe dental infection or an abscess at the root of a tooth can create a pathway for bacteria to enter the nasal passage. This is called an oronasal fistula. The resulting inflammation can cause reverse sneezing, nasal discharge, and a foul odor from the mouth or nose. Dental disease is a common problem in dogs, and regular dental care is important for overall health. ### Nasal Tumors In older dogs, a tumor in the nasal cavity can cause chronic irritation and obstruction. This is a more serious cause of reverse sneezing. Tumors can be benign or malignant. The most common signs include a persistent nasal discharge (often bloody), facial swelling, and difficulty breathing. Reverse sneezing may be one of the early signs, but it is rarely the only sign. If your senior dog develops new, persistent respiratory signs, a veterinary examination is essential. ## Risk Factors for Respiratory Illness Certain factors can increase the likelihood that reverse sneezing is due to a respiratory illness rather than simple irritation. - **Age:** Puppies and senior dogs have less robust immune systems. They are more susceptible to infections. Senior dogs are at higher risk for tumors. - **Breed:** Brachycephalic breeds are prone to respiratory issues due to their anatomy. They are also more likely to have allergic skin and respiratory disease. - **Environment:** Dogs that spend time in boarding kennels, dog parks, or grooming facilities have a higher risk of exposure to infectious respiratory diseases. - **Season:** Allergies are more common in spring and fall. Foreign bodies from grass awns are more common in the summer months. - **Geography:** The prevalence of certain diseases varies by region. For example, in Australia, grass seed foreign bodies are a common problem due to the native plant species. In North America, certain fungal infections like blastomycosis are more common in specific geographic areas. Your veterinarian will be aware of the local risks. ## The Veterinary Examination: What to Expect If you are concerned about your dog's reverse sneezing, or if it is accompanied by other signs, you should schedule a veterinary appointment. The veterinarian will perform a thorough physical examination, with a focus on the respiratory system. ### History and Observation The veterinarian will ask you about the frequency and duration of the episodes. They will want to know if the episodes are triggered by specific situations, such as eating, playing, or going outside. They will also ask about any other signs, such as coughing, nasal discharge, or changes in appetite. Observing a video of the episode can be very helpful, as the reverse sneeze may not occur during the examination. ### Physical Examination The veterinarian will listen to your dog's heart and lungs with a stethoscope. They will examine the nasal passages and throat. They may gently palpate (feel) the trachea and the throat area. They will also check the dog's temperature and look for any signs of dehydration or systemic illness. ### Diagnostic Testing If the physical examination suggests a respiratory illness, the veterinarian may recommend further tests. - **Rhinoscopy:** This involves using a small camera to look inside the nasal passages. It is the best way to identify foreign bodies, nasal mites, and tumors. This procedure usually requires general anesthesia. - **Radiographs (X-rays):** X-rays of the skull and chest can help identify masses, fluid, or dental disease. They can also assess the lungs for signs of pneumonia. - **Blood Tests:** A complete blood count (CBC) and biochemistry profile can help assess the overall health of the dog. They can identify signs of infection or inflammation. - **Culture and Sensitivity:** If there is nasal discharge, a sample may be taken and sent to a laboratory to identify the specific bacteria or fungus causing the infection. This helps the veterinarian choose the most effective antibiotic or antifungal medication. - **Biopsy:** If a mass is found during rhinoscopy, a small tissue sample (biopsy) may be taken for microscopic examination. This is the only way to determine if a tumor is benign or malignant. ## Evidence-Based Management and Treatment The treatment for reverse sneezing depends entirely on the underlying cause. There is no one-size-fits-all approach. ### For Simple Irritation Episodes If the reverse sneezing is due to irritation, the treatment is primarily supportive. The goal is to stop the current episode and prevent future ones. - **During an Episode:** Stay calm. Your dog is not choking. You can try gently stroking the dog's throat or briefly covering the nostrils with your fingers. This encourages the dog to swallow, which can help break the spasm. Do not block the nostrils for more than a second or two. - **Identify and Remove Triggers:** If you notice the episodes happen after exposure to a specific scent or in a dusty room, remove that trigger. Use a harness instead of a collar to reduce throat pressure. - **Environmental Control:** Using an air purifier in your home can reduce airborne allergens and dust. Regular cleaning of your dog's bedding can also help. ### For Allergic Rhinitis If allergies are the cause, the treatment focuses on managing the allergic response. This may include: - **Antihistamines:** Your veterinarian may recommend an antihistamine. Never give your dog any over-the-counter medication without first consulting your veterinarian, as the correct dose and type are critical. - **Fatty Acid Supplements:** Omega-3 fatty acids can help reduce inflammation in the skin and respiratory tract. - **Allergy Testing:** In severe cases, your veterinarian may refer you to a veterinary dermatologist for allergy testing and immunotherapy (allergy shots). ### For Respiratory Infections Bacterial infections are treated with antibiotics prescribed by your veterinarian. Viral infections are typically managed with supportive care, as there are no specific antiviral drugs for most canine respiratory viruses. Supportive care may include: - **Rest:** Limit your dog's exercise and activity. - **Hydration:** Ensure your dog has access to fresh water. - **Humidification:** Using a humidifier in the room where your dog sleeps can help soothe irritated airways. - **Nutrition:** If your dog's appetite is reduced, offer a highly palatable, easily digestible food. ### For Foreign Bodies A foreign body in the nasal passage must be removed by a veterinarian. This is typically done during a rhinoscopy procedure under general anesthesia. Do not attempt to remove the object yourself, as you may push it further in or cause injury. ### For Dental Disease If dental disease is the cause, the treatment involves a professional dental cleaning and, if necessary, extraction of the affected teeth. This is performed under general anesthesia. Good dental hygiene, including regular brushing and professional cleanings, can prevent future problems. ### For Nasal Tumors Treatment for nasal tumors depends on the type and stage of the tumor. Options may include surgery, radiation therapy, or chemotherapy. This is a complex condition that requires referral to a veterinary oncologist. ## Unsafe Home Remedies to Avoid When your dog makes a strange sound, it is natural to want to help. However, some common home remedies can be harmful. - **Do not give human cough medicine:** Many human cough suppressants contain ingredients that are toxic to dogs, such as acetaminophen or xylitol. Never give your dog any medication without explicit veterinary approval. - **Do not use essential oils:** Essential oils can be highly irritating to a dog's sensitive nose and can be toxic if inhaled or ingested. Avoid using diffusers or applying oils to your dog's skin. - **Do not try to "flush" the nose:** Do not attempt to squirt water or saline into your dog's nostrils. This can cause aspiration (fluid entering the lungs) and panic. - **Do not use a syringe to force water:** Forcing water into your dog's mouth can lead to aspiration pneumonia. - **Do not ignore persistent signs:** If your dog is reverse sneezing frequently, do not assume it is always harmless. If the episodes are increasing in frequency or are accompanied by other signs, seek veterinary care. ## Prevention: Reducing the Risk of Irritation Episodes While you cannot prevent all reverse sneezing, you can reduce the frequency of irritation-related episodes. - **Use a harness:** This is one of the most effective changes. It eliminates pressure on the throat. - **Manage your dog's environment:** Keep your home free of dust and use fragrance-free cleaning products. Avoid smoking around your dog. - **Control excitement:** While you should not stop your dog from being happy, you can try to keep greetings calm. This may reduce the rapid, excited breathing that can trigger an episode. - **Maintain good dental health:** Regular dental care can prevent dental disease that might lead to nasal irritation. - **Stay up-to-date on vaccinations:** While vaccines do not prevent all respiratory infections, they do protect against several common pathogens, including [canine distemper virus](/knowledge/viruses/pet-viruses/canine-distemper-virus) and [canine adenovirus](/knowledge/viruses/pet-viruses/canine-adenovirus). Discuss your dog's vaccination schedule with your veterinarian. ## Prognosis: What to Expect The prognosis for reverse sneezing is generally excellent. If the episodes are due to simple irritation, they are a normal, harmless reflex. The dog will live a completely normal life. If the episodes are due to an underlying condition, the prognosis depends on the specific diagnosis. - **Allergic Rhinitis:** This is a chronic condition, but it is manageable. With proper treatment, most dogs have a good quality of life. - **Respiratory Infections:** Most dogs recover fully from viral and bacterial respiratory infections with supportive care and appropriate antibiotics. The recovery time is typically one to three weeks. - **Foreign Bodies:** Once the foreign body is removed, the dog usually recovers quickly. The reverse sneezing stops immediately. - **Nasal Tumors:** The prognosis for nasal tumors is guarded. It depends on the type of tumor and the stage at diagnosis. Early detection and treatment offer the best chance for a positive outcome. ## Emergency Red Flags: When to Go to the ER A reverse sneeze is not an emergency. However, you need to be able to recognize the signs of a true respiratory emergency. If your dog shows any of the following signs, you should seek immediate veterinary care: - **Blue or pale gums:** This indicates a lack of oxygen. - **Collapse or loss of consciousness:** This is a sign of severe respiratory distress. - **Inability to breathe:** If your dog is struggling to inhale or exhale, or if they are making high-pitched sounds (stridor) that do not resolve. - **Continuous coughing or gagging:** This may indicate a foreign body in the throat or a collapsing trachea. - **Lethargy and weakness:** If your dog is unable to stand or is very weak. - **Fever:** A temperature above 103.5°F (39.7°C) is concerning. - **Profuse bleeding from the nose or mouth:** This could indicate a serious injury or a tumor. - **Abdominal effort to breathe:** If your dog's belly is heaving with each breath, this is a sign of significant respiratory distress. If you are ever in doubt, call your veterinarian or an emergency veterinary clinic. It is always better to be safe. ## Limitations and When to Contact a Veterinarian This article provides general educational information. It cannot diagnose your dog's specific condition. Breed-level information, such as the predisposition of brachycephalic breeds to reverse sneezing, is a general guideline. It does not predict whether your individual dog will have episodes or whether those episodes are benign. The only way to know for sure is to have your dog examined by a veterinarian. You should contact your veterinarian if: - The reverse sneezing episodes are becoming more frequent or more severe. - The episodes last longer than one minute. - The reverse sneezing is accompanied by nasal discharge, coughing, lethargy, or a reduced appetite. - Your dog has a fever. - You notice blood in the nasal discharge. - Your dog is a senior and is showing new respiratory signs. - You suspect your dog has inhaled a foreign body. - You have any concerns at all. Your veterinarian is your partner in your dog's health. They can perform a physical examination, recommend appropriate diagnostic tests, and develop a treatment plan tailored to your dog's individual needs. Do not delay seeking professional advice. ## Frequently Asked Questions ### 1. How long does a reverse sneeze last? A single reverse sneeze episode typically lasts from a few seconds up to one minute. If an episode lasts longer than a minute or is followed by signs of distress, you should contact your veterinarian. ### 2. Can I stop a reverse sneeze by covering my dog's nostrils? Yes, gently covering your dog's nostrils for one or two seconds can encourage them to swallow, which often breaks the spasm. Do not hold the nostrils closed for longer, as this can cause anxiety. ### 3. Is reverse sneezing more common in certain breeds? Yes, brachycephalic breeds like Pugs, Bulldogs, and Boxers are more prone to reverse sneezing due to their elongated soft palates. However, any dog can experience it. ### 4. Can allergies cause reverse sneezing in dogs? Yes, allergic rhinitis, which is inflammation of the nasal passages due to inhaled allergens, is a common cause of frequent reverse sneezing. ### 5. What is the difference between a reverse sneeze and a cough? A reverse sneeze is a rapid, forceful inhalation through the nose that makes a snorting sound. A cough is an explosive exhalation of air from the lungs through the mouth. Coughing is more commonly associated with lower respiratory tract issues. ### 6. Should I take my dog to the vet for a reverse sneeze? If it is an isolated episode and your dog appears normal afterward, you do not need to rush to the vet. However, if the episodes are frequent, persistent, or accompanied by other signs like nasal discharge or lethargy, you should schedule a veterinary appointment. ### 7. Can a foreign body cause reverse sneezing? Yes, a foreign body such as a grass seed lodged in the nasal passage can cause intense irritation and repeated reverse sneezing. This requires veterinary removal. ### 8. Is reverse sneezing a sign of kennel cough? Reverse sneezing can occasionally be seen with kennel cough (canine infectious respiratory disease complex), but the hallmark sign of kennel cough is a dry, hacking cough. If your dog has a cough along with reverse sneezing, consult your veterinarian. ## Related Clinical & Scientific Guides * [My Cat Does Not Cough Up Hairballs](/knowledge/veterinary-medicine/symptom-guides/my-cat-does-not-cough-up-hairballs) * [Why Is My Cat developing dandruff suddenly? Walking Dandruff Cheyletiella and Diet](/knowledge/veterinary-medicine/symptom-guides/why-is-my-cat-developing-dandruff-suddenly-walking-dandruff-cheyletiella-and-diet) * [Cat Diarrhea Home Treatment](/knowledge/veterinary-medicine/symptom-guides/cat-diarrhea-home-treatment)