Almost all people have experienced disruption of the respiratory tract due to blockage of thick fluid in the form of phlegm that blocks the airways. Various diseases that trigger inflammation in the airways can contribute to increased phlegm production. Phlegm is produced by the lungs and respiratory system that goes to the lungs. Distinguish from mucus, which is mucus produced by the nose or sinuses. Phlegm rarely leaves the body except when coughing. Usually, coughing as a symptom of respiratory tract infections, such as bronchitis and pneumonia, is a type of cough that expels phlegm. Phlegm itself is often associated with the presence of diseases in the respiratory tract. This is logical considering that phlegm is a substance released by the airways during disease or inflammation. In addition to bronchitis and pneumonia, various other diseases can also increase phlegm production, such as flu, asthma, sinusitis, allergies, COPD, and stomach acid. In sputum, contained inflammator...