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 ...

When a person catches a common cold, symptoms start to appear gradually. This includes a sore throat, a runny nose, fever, and the buildup of mucus in the nose and throat. Many of us may have ...

Medically reviewed by Susan Russell, MD Key Takeaways Coughing up white mucus can be a sign of an upper respiratory infection ...

Mucus is a thin, slippery fluid that lines the nose, throat, and other passages to trap dust and germs. Phlegm is a thicker type of mucus produced in the lungs to catch and remove harmful particles ...

Kristin Ahrens is a member of the National Association of Pediatric Nurse Practitioners (NAPNAP) and the National Association of School Nurses (NASN). Not many things are as uncomfortable and annoying ...