If your mucus is gray or black... …you likely inhaled dark-colored particles, like smoke from a fire or heavy exhaust.

This study tests a new method to open a patient's nasal passages by a simple mouth guard that uses gentle electrical pulses to regulate the nerves in the nasal cavity, enabling better breathing ...

The asthma medication reduces congestion in patients with severe, uncontrolled chronic rhinosinusitis with nasal polyps in a ...