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My dog has reverse sneezing, vomiting, and diarrhea. What's wrong?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | unneutered | 10.4 lbs

My dog has been reverse sneezing for the past 3 days , he vomited 3 times yesterday, and twice today. He also has diahrea. What is wrong ?

1 Answer

Most Helpful Answer

Jenna Beyer, DVM, MBA, cVMA

Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on August 2nd, 2017

Reverse sneezing can be caused by allergies, upper respiratory infection, or something caught in the back of the nose or throat causing irritation. Sometimes the reverse sneeze can cause vomiting, or it is possible that some vomit got into the nasal passages and is causing irritation and thus reverse sneezing. However, I am more concerned that Benny is having vomiting and diarrhea at the same time. Small dogs can become dehydrated very quickly. Possible causes for vomiting and diarrhea include intestinal parasites, bacterial or viral infections, intestinal blockages, or other internal issues. If Benny has been having both vomiting and diarrhea for more than 24 hours, he should be seen by a vet as soon as possible.
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