Why does my dog sneeze when I pet him?

Many dog owners notice that dogs have a tendency to sneeze whenever they play or get excited about something. This might be the case when you are petting him. The dog might be excited by the fact that he’s getting attention so this leads to a harmless sneeze or snort.

Why does my dog reverse sneeze when excited?

It sounds like the dog is trying to inhale a sneeze, and it is therefore known as reverse sneezing. Reverse sneezing is often caused by irritation of the palate/laryngeal area

Why does my dog sneeze on me on purpose?

The main reason dogs (and people sneeze) is because something is irritating the inside of the nose, such as pollen from seasonal pet allergies. The body induces the sneeze to try and get rid of the irritation as quickly as possible.