My dog suddenly cannot stop sneezing?

A sneeze in a dog serves the same purpose as a sneeze in a human. The body is trying to clear the nasal passages of an irritant. Sudden non-stop sneezing can be an indication of a foreign body or Allergies. If your pet has allergies speaking to your vet about a safe dose of Benadryl may be helpful. If you suspect a foreign body you pet will need to be seen by a vet.