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Phlegm (/ ˈ f l ɛ m /; Ancient Greek: φλέγμα, phlégma, "inflammation", "humour caused by heat") is mucus produced by the respiratory system, excluding that produced by the throat nasal passages. It often refers to respiratory mucus expelled by coughing, otherwise known as sputum.
Having green, yellow, or thickened phlegm (sputum) does not always indicate the presence of an infection. Also, if an infection is present, the color of the phlegm (sputum) does not determine whether a virus, a bacterium or another pathogen has caused it. Simple allergies can also cause changes in the color of the mucus. [1]
A cough is a sudden expulsion of air through the large breathing passages which can help clear them of fluids, irritants, foreign particles and microbes.As a protective reflex, coughing can be repetitive with the cough reflex following three phases: an inhalation, a forced exhalation against a closed glottis, and a violent release of air from the lungs following opening of the glottis, usually ...
The type of cough you have is a clue to what's causing it: A wet cough (the type that brings up phlegm or mucus) is often a sign of a lower respiratory infection.
A lot of different things can cause a cough. But coughs are usually broken down into two main categories: acute and chronic. Acute coughs are ones that come on suddenly, usually due to an illness.
Cough is one of the most common causes for visits to a health care provider. ... Let's look at some of the diseases that have cough as a symptom. Cough is one of the most common causes for visits ...
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