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 ...

You should see a doctor promptly if your cough is accompanied by fevers, chills, night sweats, coughing up blood, shortness ...

When a person has black or dark-colored mucus, they may have inhaled potentially harmful pollutants. Coughing up black mucus may also be due to an underlying infection or condition. Mucus serves ...

Sinus pressure is discomfort in sinus cavities due to colds, allergies, or infections. Swollen mucus membranes trap harmful ...

ROME and LONDON -- Pope Francis suffered two episodes of "acute respiratory failure" on Monday, the Vatican said. The episodes were caused by a "significant accumulation of endobronchial mucus and ...

For the study, the researchers first analysed how water loss or transpiration occurs in the mucus of upper airways in humans, ...