
(HealthDay News) -- Frequent coughing is a sign of an illness, allergen or exposure to something that's irritating your lungs.
Here are suggestions to help tame the hacking, courtesy of the U.S. National Heart Lung and Blood Institute:
Sleepy Nurses Vulnerable To Common Cold, Other Infectious Diseases
Saltwater Drops in Nose Could Shorten Kids' Colds
Experimental Nasal Spray Might Ward Off Multiple Viruses