If your mucus is gray or black... …you likely inhaled dark-colored particles, like smoke from a fire or heavy exhaust. Regular smokers can also blow out darker mucus because of the tar or other toxic ...

Vasomotor rhinitis is a cause of runny nose and congestion not related to allergies or an infection. Learn about the symptoms ...

Mouth taping may help reduce mouth breathing during sleep. Learn this practice's possible benefits and risks and what the ...