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As gross as it sounds, your mucus—be it clear, green, yellow, or brown—is a reflection of your overall health. ... What does green snot mean? “Green phlegm is likely related to an infection ...
Its color can vary from transparent to pale or dark yellow and green, from light to dark brown, and even to dark grey depending on the contents. [1] The body naturally produces about 1 quart (about 1 litre) of phlegm every day to capture and clear substances in the air and bacteria from the nose and throat.
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]
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Symptoms of bronchiectasis commonly include a cough productive of frequent green or yellow sputum lasting months to years. [3] Other common symptoms include difficulty breathing , wheezing (a whistling sound when you breathe), and chest pain .
Also known as phlegm, mucus is made up of mostly water, but it also contains "remnants of skin-lining cells (epithelial cells), antimicrobial enzymes, proteins and inorganic salts," explains Nasseri.
In those with the common cold, the color of the sputum or nasal secretion may vary from clear to yellow to green and does not indicate the class of agent causing the infection. [312] The color of the sputum is determined by immune cells fighting an infection in the nasal area.
The phlegm of humorism is far from phlegm as it is defined today. Phlegm was used as a general term to describe white or colorless secretions such as pus, mucus, saliva, or sweat. [26] Phlegm was also associated with the brain, possibly due to the color and consistency of brain tissue. [26]