Skip to Content
Home > Wellness > Health Library > Mucus
Mucus is a thick, slippery and usually clear substance that is
produced in the lining of body cavities or canals, such as the nose, throat,
sinuses, and airways of the lungs. Mucus protects and moistens the lining of
body organs, such as the stomach and intestines, and traps dust particles,
smoke, bacteria, and other irritants that enter the nose when a person
Mucus that becomes too thick and sticky can block the airway or
digestive system or cause other problems in the body. Thick and sticky mucus
is difficult for the body to remove and can increase the risk of
Current as of:
November 14, 2014
Patrice Burgess, MD - Family Medicine & Donald R. Mintz, MD - Otolaryngology
How this information was developed to help you make better health decisions.
To learn more, visit Healthwise.org
© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.