When you sneeze why does air come out of your nose?

When you sneeze, your body forcefully expels air from your lungs through your nose and mouth to clear irritants from your nasal passages. This rapid expulsion of air can cause mucus and other particles to be expelled as well. The pressure generated during a sneeze can cause air to exit through the nose, particularly if the mouth is closed. This reaction helps to protect your respiratory system by removing foreign substances.