Getting up in the morning with phlegm that is thick and sticky but not coughing may be considered a sinus infection.
Generally speaking, coughing up phlegm is accompanied by coughing, and common diseases include pneumonia, tuberculosis, and chronic bronchitis. However, if you only cough up phlegm but don’t cough much, the mucus may not be secreted by the lungs or bronchial tubes, so you may consider sinusitis.
The paranasal sinuses, also known as the sinuses, are four pairs of sinuses that are paired left and right, known as the frontal sinuses, maxillary sinuses, pterygoid sinuses, and sieve sinuses. When the sinuses are inflamed, a large amount of pus is produced in the sinus cavities, which may be accompanied by blood. It is difficult to blow your nose clean and it often runs down your throat.
At night, when you sleep flat on your back, the pus from the frontal sinuses flows right down into the throat, and in the morning you feel like you have phlegm, but you don’t want to cough. This is because the production of phlegm has nothing to do with the lungs and the so-called “phlegm” is not really phlegm.
The treatment of sinusitis is complicated, often with medication and surgery, and requires prompt medical attention and standardized treatment under the guidance of a doctor.