Phlegm in the throat can be super annoying but in all reality, phlegm and mucus serves an important role in the human body. Phlegm and mucus acts like the oil in a car does; it makes the engine move.

phlegm

I have a cough then suddenly, the phlegm was blocking my throat.

Phlegm will go into your stomach and the acid in your stomach will dispose of it naturally, just the way it does when you swollow food. It is not harmful to swallow phlegm.

Phlegm helps to trap foreign materials such as dirt, microbes and pollutants from going further into the body. Phlegm comes in different colors from shades of green to white.