When you get up in the morning and feel phlegm, most of them are caused by inflammation of the respiratory tract, and if it occurs repeatedly it is mainly caused by chronic bronchitis and chronic inflammation of the throat. Normally, there are swallowing actions such as drinking and talking during the day, which also stimulate to cause coughing and will discharge the secretions in the respiratory tract, and there will be a reduction in these actions at night when you sleep, and you cannot discharge the secretions in the respiratory tract in time, and when you get up in the morning, the phlegm will stimulate the respiratory tract to cough and will discharge the secretions in the respiratory tract, and you will feel more phlegm. There will also be a decrease in the body’s resistance at night, which will make the inflammation more serious and cause excessive inflammatory secretions, which need to be actively treated with antibacterial and anti-inflammatory drugs, cough and phlegm, and caused by chronic pharyngitis also need to use phlegm and pharyngeal drugs.