You should spit out your phlegm.
Your body produces the phlegm which contains bacteria that your body is trying to get rid of.
So you should always spit our your phlegm to get rid of that bacteria.
Phlegm should be spit up and not swallowed.
Phlegm is a type of mucus made in your chest.
You typically don't produce noticeable amounts of phlegm unless you are sick with a cold or have some other underlying medical issue.
When you cough up phlegm, it's called sputum.
You may notice different colored sputum and wonder what the colors mean.
The sinuses, throat, and nose all produce mucus that a person usually swallows unconsciously.
When mucus starts to build up or trickle down the back of the throat, this is known as postnasal drip.
Causes of postnasal drip include infections, allergies, and acid reflux.
Mucus and phlegm are similar, yet different: Mucus is a thinner secretion from your nose and sinuses.
Phlegm is thicker and is made by your throat and lungs.
Some ways to get rid of phlegm include.
Keeping the air moist.
Drinking plenty of fluids.
Applying a warm, wet washcloth to the face.
Keeping the head elevated.
Not suppressing a cough.
Discreetly getting rid of phlegm.
Using a saline nasal spray or rinse.
Gargling with salt water.