If your dog is sneezing and throwing up, it can be concerning to see them struggle with these symptoms at the same time.
Sneezing may point to respiratory irritation, while vomiting could signal digestive upset or something more serious. When combined, these issues may mean an underlying condition that needs attention.
We outline the common causes of dog sneezing and throwing up, what you can do at home, and when to seek veterinary help.
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Dog Sneezing and Throwing Up — Why It Happens
Dogs may sneeze and vomit for a variety of reasons, often involving the respiratory or digestive systems. Allergies, infections, and nasal irritants can trigger sneezing, while vomiting may occur due to stomach irritation, toxins, or systemic illness.
In some cases, the two symptoms are linked — for example, when mucus drainage irritates the stomach or when infection affects both breathing and digestion.
These signs should not be ignored, as they could indicate anything from minor irritation to a more serious underlying condition.
Common Causes of Dog Sneezing and Throwing Up
Allergies
Dogs can develop allergies to pollen, dust, mold, food ingredients, or even household cleaning products.
Sneezing occurs as their nasal passages react to allergens. Vomiting may happen if the allergen is ingested or causes enough irritation to upset the stomach.
Pet owners may also notice watery eyes, itching, or paw licking. Allergies can range from mild to severe, and chronic cases often require veterinary guidance to manage effectively.
Read more: Dog Sneezing and Shaking Head (When you should worry)
Respiratory Infections
Conditions such as kennel cough, canine influenza, or other respiratory infections may cause dogs to sneeze repeatedly.
Infections can also trigger vomiting when mucus is swallowed, or if fever and general illness disrupt normal digestion.
A coughing dog that also vomits after sneezing or gagging may be struggling with an upper respiratory infection. These illnesses can spread quickly, so prompt veterinary care is important.
Nasal Irritants or Foreign Bodies
Strong odors, smoke, perfume, or chemicals can irritate a dog’s nasal passages, leading to sneezing. If a foreign body like a grass seed becomes lodged in the nasal cavity, it can also provoke repeated sneezing fits.
Vomiting may follow because of gagging, swallowing irritants, or because of the stress of repeated sneezing.
This combination is uncomfortable and potentially dangerous if the irritant or object is not removed.
Gastrointestinal Upset
Sometimes vomiting comes first, followed by sneezing as part of the body’s reaction to stomach contents being regurgitated.
Dogs with stomach infections, dietary indiscretion (eating garbage, spoiled food, or non-food items), or food sensitivities may show both sneezing and vomiting.
If gastrointestinal upset is ongoing, it can cause dehydration and weakness, making quick evaluation important.
Parasites
Certain parasites, such as lungworms or roundworms, can contribute to respiratory irritation and gastrointestinal upset. Lungworms may cause coughing and sneezing, while intestinal worms often lead to vomiting.
If left untreated, parasites can damage a dog’s organs and overall health. Stool changes, weight loss, or lethargy may accompany these symptoms.
Toxins or Poisoning
Exposure to toxic substances like household cleaners, human foods (such as chocolate or xylitol), or plants can cause sneezing, gagging, and vomiting. Sneezing may occur if the toxin irritates the nose or airways, while vomiting is the body’s way of trying to expel harmful substances.
This situation is urgent, and immediate veterinary attention is critical to prevent long-term harm.
What to Do If Your Dog Is Sneezing and Throwing Up
If your dog is sneezing and throwing up, the first step is to monitor them closely. Ensure they have access to fresh water and encourage them to rest in a quiet, comfortable environment.
Keep track of how often they vomit and sneeze, and note any additional symptoms such as coughing, lethargy, or diarrhea. If you suspect allergies, try to minimize exposure to potential triggers like pollen, dust, or smoke.
Offering a bland diet of boiled chicken and rice for 24–48 hours can sometimes help with mild stomach upset. However, if symptoms persist or worsen, avoid delaying veterinary care.
Never give your dog human medications without veterinary guidance, as some can be toxic. Instead, focus on keeping them comfortable and hydrated until you can seek professional advice.
When to Call or Visit Your Vet
If your dog vomits multiple times within a short period, becomes lethargic, or refuses to eat or drink, you should contact your veterinarian immediately.
Seek urgent help if there is blood in the vomit, green or yellow bile, or signs of dehydration such as sunken eyes and dry gums. Frequent or forceful sneezing, nasal discharge with blood or pus, or signs of difficulty breathing are also warning signs.
Puppies, senior dogs, and those with existing health conditions are at greater risk of complications and should be seen quickly if they develop these symptoms. When in doubt, it’s always safer to call your vet.
Read more: Dog Sneezing and Coughing (What it means)
Key Takeaway
Dog sneezing and throwing up may stem from minor issues like allergies or mild stomach upset, but they can also indicate infections, parasites, or toxin exposure. Because both symptoms affect essential body systems, they should never be ignored.
Supportive care at home may help mild cases, but if symptoms are frequent, severe, or accompanied by other concerning signs, professional veterinary care is the best way to protect your dog’s health. Acting early ensures your dog gets the relief and treatment they need to recover fully.