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 ...

Whether you’re dealing with a runny nose, cough or congestion, your mucus can help determine if it’s a minor bother like a common cold, allergies or a more serious health issue. That’s right, the ...

Medically reviewed by Susan Russell, MD Key Takeaways Coughing up white mucus can be a sign of an upper respiratory infection or chronic conditions like COPD. Viral infections that cause white mucus ...

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 ...