Reverse sneezing and vomiting in dogs

Reverse sneezing and vomiting in dogs

Reverse sneezing is the spontaneous expulsion of the intranasal portion of the nasal cavity. It occurs by the same reflexive mechanism that causes reflex coughing or sneezing.

Although the exact cause is unknown, reverse sneezing is thought to be a result of the release of r from the distended posterior rways in the nasal cavity. It may also be caused by increased sympathetic stimulation, or to a decreased mucosal resistance to rflow.

Reverse sneezing is most commonly seen in younger dogs. It tends to be most common in fast-growing dogs and young puppies. It may also be seen in older dogs that have developed a nasal polyp and have a high nasal volume.

Clinical presentation

Signs and symptoms

The presenting signs of reverse sneezing are most commonly associated with nose blowing and include:

Excessive or inappropriate nose blowing

Stuffed-up or nasal discharge

Nasal crusting


Abdominal discomfort

The appearance of the tongue, mouth, and teeth may also be affected due to the high levels of negative pressure in the nasal cavity. The nose is often seen at the end of a dog's head with both eyes looking upward when the dog's mouth is closed. The rway is typically not clear as the nostril will close and a very forceful nose blow will often cause that aspect of the rway to clear. This is in contrast to typical sneezing, which results in a clear passage through the nose as the nose attempts to clear the rway. This is due to the sudden release of pressure in the pharynx and nasal rway. This increased r pressure and the sudden release of r pressure in the pharynx causes a reflex that starts the sneezing process.

The mouth is also often seen at the end of the head and mouth open with the tongue hanging out. It is believed that when the mouth is at the end of the head, the negative pressure in the nasal cavity causes the pressure in the brn to increase. This in turn, causes the muscle contraction in the mouth which forces the tongue out.

There are several other symptoms that occur as a result of reverse sneezing including:


Loss of appetite

Abdominal discomfort

Neck pn

Stiff or sore back

Itchy scalp


Reverse sneezing is more common in some breeds than others.

Breeds with more frequent reverse sneezing include:



Cocker Spaniel

Golden Retriever

Lhasa Apso

Labrador Retriever

English Setter


There has been a great deal of speculation as to the exact causes of reverse sneezing. While many of these theories are quite plausible, research into the topic is lacking.

One suggested reason for the reflex sneeze is that during a cold, mucus accumulates in the back of the nose, and the increased rflow caused by reverse sneezing forces more mucus out of the nose and past the tongue, into the mouth.


External links

The Sneezer


Category:Human head and neck

Watch the video: My reverse sneezing dog

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