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Coughing up discolored phlegm (green, yellow, or brown are all concerning colors) and that’s been persistent for more than two weeks. Coughing up blood-tinged mucus or phlegm. Difficulty ...
Signs your cough is getting better. ... Irritation of the back of your throat and voice changes improve. You no longer have a fever, if you had one at all. You’re breathing more comfortably.
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]
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.
The green color of mucus comes from the heme group in the iron-containing enzyme myeloperoxidase secreted by white blood cells as a cytotoxic defense during a respiratory burst. In the case of bacterial infection, the bacterium becomes trapped in already-clogged sinuses , breeding in the moist, nutrient-rich environment.
The increased secretions are initially cleared by coughing. [36] The cough is often worse soon after awakening, and the sputum produced may have a yellow or green color and may be streaked with specks of blood. [42] In the early stages, a cough can maintain mucus clearance.
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