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If you experience difficulty breathing, develop a severe cough, notice thick green or yellow mucus, run a fever, and/or feel extremely fatigued. If your symptoms worsen instead of improve over time.
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, sweat, or semen. [25] Phlegm was also associated with the brain, possibly due to the color and consistency of brain tissue. [25]
Phlegm is more related to disease than mucus, and can be troublesome for the individual to excrete from the body. Phlegm is a thick secretion in the airway during disease and inflammation. Phlegm usually contains mucus with virus, bacteria, other debris, and sloughed-off inflammatory cells.
People believed that the human body contained four humours: blood, phlegm, yellow bile, and black bile. [1] Illnesses and problems were understood as being caused by dyscrasia, or an imbalance in the four humours. Treatments for disease had the aim of restoring a balance, curing the patient.
Along with a runny nose and sore throat, green phlegm is another cold-like symptom of COVID-19. Interestingly, the color of the mucus is an important indicator when it comes to infection.
However, some researchers argue that the flow of mucus down the back of the throat from the nasal cavity is a normal physiologic process that occurs in all healthy individuals. [1] Some researchers challenge post-nasal drip as a syndrome and instead view it as a symptom, also taking into account variation across different societies.
The Hippocratic Corpus explains diseases using the Four Humours in which are described a Phlegm, Yellow Bile, Blood and Black Bile. These medical writings associated each of the humours with a specific organ which goes as follows; blood with the heart, yellow bile with the liver, black bile with the spleen and phlegm with the brain.
It was based on the belief that disease is caused by an imbalance of the four "humours" (blood, phlegm, yellow bile, and black bile) and sought to treat disease symptoms by correcting that imbalance, using "harsh and abusive" methods to induce symptoms seen as opposite to those of diseases [4] rather than treating their underlying causes ...