Phlegm
Phlegm is mucus produced by the respiratory system, excluding that produced by the nasal passages. It often refers to respiratory mucus expelled by coughing, otherwise known as sputum. Phlegm, and mucus as a whole, is in essence a water-based gel consisting of glycoproteins, immunoglobulins, lipids and other substances. Its composition varies depending on climate, genetics, and state of the immune system. 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 constituents. The body naturally produces of phlegm every day to capture and clear in the air and bacteria from the nose and throat.
Distinction between mucus and phlegm
Contrary to popular misconception and misuse, mucus and phlegm are not always the same.Mucus
Mucus is a normal protective layering around the airway, eye, nasal turbinate, and urogenital tract. Mucus is an adhesive viscoelastic gel produced in the airway by submucosal glands and goblet cells and is principally water. It also contains high-molecular weight mucous glycoproteins that form linear polymers.Phlegm
Phlegm is more related to disease than is mucus and can be troublesome for the individual to excrete from the body. Phlegm is a juicy secretion in the airway during disease and inflammation. Phlegm usually contains mucus with virus, bacteria, other debris, and sloughed-off inflammatory cells. Once phlegm has been expectorated by a cough, it becomes sputum.Excessive phlegm creation
There are multiple factors that can contribute to an excess of phlegm in the throat or larynx.- Vocal abuse: Vocal abuse is the misuse or overuse of the voice in an unhealthy fashion such as clearing the throat, yelling, screaming, talking loudly, or singing incorrectly.
- *Clearing the throat: Clearing the throat removes or loosens phlegm but the vocal cords hit together causing inflammation and therefore more phlegm.
- *Yelling/screaming: Yelling and screaming both cause the vocal cords to hit against each other causing inflammation and phlegm.
- *Nodules: Excessive yelling, screaming, and incorrect singing as well as other vocal abusive habits can cause vocal fold nodules.
- Smoking: Smoke is hot, dry, polluted air which dries out the vocal cords. With each breath in of smoke, the larynx is polluted with toxins that inhibit it from rehydrating for about 3 hours. The vocal cords need a fair amount of lubrication and swell from inflammation when they do not have enough of it. When the vocal folds swell and are inflamed, phlegm is often created to attempt to ease the dryness.
- *Experiment on smoking correlations: In 2002, an experiment was done and published by the American College of Chest Physicians to find if there was a correlation of smokers with coughing and phlegm. In the study, 117 participants were studied, a mix of current smokers, ex-smokers, non-smokers, and a positive control of participants with a disease, COPD At the end of the experiment, experimenters found that there was a high correlation between phlegm and cough with smoking of 0.49
- Illness: During illness like the flu, cold, and pneumonia, phlegm becomes more excessive as an attempt to get rid of the bacteria or viral particles within the body. A major illness associated with excess phlegm is acute bronchitis. A major symptom of acute bronchitis is an excess amount of phlegm and is usually caused by a viral infection, and only bacterial infections, which are rare, are to be treated with an antibiotic.
- Hay fever, asthma: In hay fever and asthma, inner lining in bronchioles become inflamed and create an excess amount of phlegm that can clog up air pathways.
- Air pollution: In studies of children, air pollutants have been found to increase phlegm by drying out and irritating parts of the throat.
Removing phlegm
Phlegm naturally drains down into the back of the throat and can be swallowed. Once in the stomach, the acids and digestive system will remove the phlegm and get rid of the germs in it.
The alternative to swallowing would be throat-clearing. To do this, the mouth should be closed and air should be inhaled hard into the nose. Inhaling forcefully through the nose will pull excess phlegm and nasal mucus down into the throat, where muscles in the throat and tongue can prepare to eject it. Once this is done, a U-shape should be formed with the tongue, while simultaneously forcing air and saliva forward with the muscles at the back of the throat. At this point, the phlegm will be in the mouth and is now ready to be spat out as sputum.
Colors of phlegm
Phlegm can exist in different colors. The color could provide important clues about a person's health.- Yellow or green: Indicates viral infection. The color is caused by an enzyme produced by the white blood cells combating the infection. If the phlegm stays this color for more than a week, it may mean that the viral infection became a bacterial one.
- Clear: Indicates allergies. Mucus membranes produce histamines and make more phlegm.
- Red: Indicates dry air. A nasal spray can be used to alleviate symptoms of a dry nose and throat.
Phlegm and humourism
Phlegm was thought to be associated with apathetic behaviour; this old belief is preserved in the word "phlegmatic". This adjective always refers to behaviour, and is pronounced differently, giving full weight to the "g": not /ˈflɛmatɪk/ but /flɛgˈmatɪk/. To have "phlegm" traditionally meant to have stamina and to be unswayed by emotion. Sir William Osler’s 1889 discusses the imperturbability or calmness in a storm required of physicians. "'Imperturbability means coolness and presence of mind under all circumstances, calmness amid storm, clearness of judgment in moments of grave peril, immobility, impassiveness, or, to use an old and expressive word, phlegm." This was his farewell speech at the University of Pennsylvania in 1889 before becoming Physician-in-Chief at the recently founded Johns Hopkins Hospital in Baltimore, Maryland. This is from in the of the ."
The phlegm of Humourism is far from the same thing as phlegm as it is defined today. Nobel laureate Charles Richet MD, when describing humorism's "phlegm or pituitary secretion" in 1910 asked rhetorically, "this strange liquid, which is the cause of tumours, of chlorosis, of rheumatism, and cacochymia - where is it? Who will ever see it? Who has ever seen it? What can we say of this fanciful classification of humours into four groups, of which two are absolutely imaginary?"
Illnesses related to phlegm
Phlegm may be a carrier of larvae of intestinal parasites. Bloody sputum can be a symptom of serious disease, but can also be a relatively benign symptom of a minor disease. In the latter case, the sputum is normally lightly streaked with blood. Coughing up any significant quantity of blood is always a serious medical condition, and any person who experiences this should seek medical attention.Apophlegmatisms, in pre-modern medicine, were medications chewed in order to draw away phlegm and humours.