2 doctors weighed in:

What is the crud when you clear your throat out?

2 doctors weighed in
Dr. Martin Raff
Internal Medicine - Infectious Disease
1 doctor agrees

In brief: Secretions

This may be some post-nasal drip from sinus drainage, or simply the body's way of getting unwanted materials out of the upper respiratory tract.
Your tissues have a brush border and secrete mucous to entrap foreign particles and sweep them out so that they don't get into the lungs and cause pneumonia.

In brief: Secretions

This may be some post-nasal drip from sinus drainage, or simply the body's way of getting unwanted materials out of the upper respiratory tract.
Your tissues have a brush border and secrete mucous to entrap foreign particles and sweep them out so that they don't get into the lungs and cause pneumonia.
Dr. Martin Raff
Dr. Martin Raff
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