A sneeze acts as a biological reset button for your nose.

A 2012 study published in The FASEB Journal by researchers at the University of Pennsylvania revealed that sneezing is the body's natural way of resetting the nasal environment. The researchers used cells from the noses of both mice and humans to observe how they responded to a pressure-induced 'sneeze.'The nasal cavity is lined with microscopic, hair-like structures called cilia. These cilia beat in a coordinated rhythm to move mucus, dust, and allergens toward the throat for disposal. When an irritant enters the nose, it disrupts this delicate synchronization, causing the cilia to lose their rhythm and effectiveness.The study found that a sneeze generates a high-velocity air flow that provides a mechanical reset for these cilia. This burst of energy allows the hairs to restart their coordinated beating simultaneously. This process is essential for maintaining a healthy respiratory system and preventing infections.Interestingly, the researchers also discovered that people with chronic sinus conditions may have a 'broken' reset button. In these individuals, the cilia do not respond as effectively to the pressure of a sneeze, which explains why they often suffer from persistent congestion. This discovery has helped scientists better understand how to treat long-term respiratory issues.