If you’re blowing your nose regularly, it’s hard not to notice your mucus—and what color it is. So it can also be alarming if you happen to spot yellow, brown, bloody, or green mucus in your used ...

Mucus isn't exactly something people give much thought to — until they're sick and dealing with a constantly runny nose. But mucus is actually an important part of a healthy immune system, according ...

Americans are weathering the worst flu season in years, as a number of other respiratory illnesses circulate too, such as COVID-19, RSV and the common cold. A telltale sign you’re getting sick is ...

It is not unusual to cough up phlegm with a common cold. However, it can also indicate a different, sometimes serious, underlying condition such as stomach acid reflux, lung disease, or heart disease.

Your body produces mucus naturally to protect your respiratory system, and under normal circumstances, this protective fluid remains clear and relatively thin. However, when mucus suddenly changes to ...