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 ...

Dear Mayo Clinic: My grandson frequently has a runny nose, and the color of the nasal mucus is sometimes green to yellowish. I’ve heard that this is a sign of a bacterial infection and perhaps the ...

The color of the phlegm from patients with the lung disease bronchiectasis can indicate the degree of inflammation in their lungs and predict their future outcomes, according to new research presented ...

Lynn Nazareth does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Add Yahoo as a preferred source to see more of our stories on Google. Curious about your snot? Plenty of people take a peek at what winds up in their tissue after a good nose blow, but doctors say ...