Regular mucus tends to be thin and slippery, and it is generally a constant presence on a day-to-day basis. Meanwhile, phlegm ...

Nasal polyps are benign (meaning noncancerous), Dr. Kelley notes. That said, some nasal masses that carry the risk of developing into malignant tumors could be mistaken for polyps. So getting examined ...

A basic review of the anatomy, physiology and personal protective equipment related to the respiratory system.