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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]
What causes a cough? ... “A productive cough is a cough that produces phlegm,” Dr. Youssef says. But a non-productive cough is more dry, says John M. Coleman III, M.D., a pulmonary and ...
Chronic bronchitis is defined clinically as a persistent cough that produces sputum (phlegm) and mucus, for at least three months in two consecutive years. Chronic bronchitis is often the cause of "smoker's cough". The tobacco smoke causes inflammation, secretion of mucus into the airway, and difficulty clearing that mucus out of the airways.
What Is Green Phlegm and What Causes It? “Green phlegm comes from white blood cells coming to the sinuses, and releasing the contents of neutrophils,” says Dr. Aaron Hartman, MD a doctor at ...
If your phlegm is yellow/green, you likely have a viral infection. This hue is caused by an enzyme produced by your white blood cells that are fighting off the infection.
The primary symptom is a cough with sputum that may be purulent.The illness may also cause shortness of breath or wheezing. Upper respiratory tract infections (URTIs) often precede acute bronchitis, with overlapping symptoms including headache, nasal congestion, and sore throat.
Phlegm can lead to congestion, coughing, and breathing problems. We spoke to medical experts on the causes, symptoms, and treatments of phlegm.
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