Yes it can if it goes in the corners of your eyes and down your sinus.
Black-looking phlegm can be caused by old blood that either ran down your throat from your mouth or nose due to a cold or dry membranes or from similar old blood in your bronchial tubes from a lung infection or bronchitis. Having bloody sputum (phlegm) is called hemoptysis. Phlegm can be colors ranging from white to black and the color is often, but not always, in streaks in the sputum. Yellow, brown, green, red, pink, and black phlegm are all reasons to see your doctor to determine the cause. See the related question below for more information about causes of black phlegm.
Black-looking phlegm can be caused by old blood that either ran down your throat from your mouth or nose due to a cold or dry membranes or from similar old blood in your bronchial tubes from a lung infection or bronchitis. Having bloody sputum (phlegm) is called hemoptysis. Phlegm can be colors ranging from white to black and the color is often, but not always, in streaks in the sputum. Yellow, brown, green, red, pink, and black phlegm are all reasons to see your doctor to determine the cause. See the related question below for more information about causes of black phlegm.
Not usually, no.
of course it DOES
Common cold viruses are the ones that most commonly cause phlegm in your throat.
If it seems unusually weak, it might be a good preventive measure to replace it. No telling if it could cause a wound if it breaks.
It can cause a buildup of phlegm and mucus in the airways, but not in the lungs.
Phlegm itself doesn't directly cause burping, but it can contribute to conditions that may lead to burping. For instance, excess phlegm can lead to swallowing air while coughing or clearing the throat, which can result in burping. Additionally, post-nasal drip from phlegm can irritate the stomach, potentially increasing gas and causing burping as well.
no.
Dairy Products cause phlegm in the throat
Orange juice can cause the mucus to thicken in your body and can cause you to produce more phlegm. Many people still drink it however when they have a cold because it contains Vitamin C.
No, bananas do just the opposite, hon. ^^ bananas cleanse the lungs of phlegm. when you're sick, go ahead and eat one! heehee. =^.^=