Cystic fibrosis, or CF, is a lifelong genetic condition that affects how the body produces mucus, sweat, and digestive fluids. More than 100,000 people across 94 countries have been diagnosed with ...

Understanding how mucus changes, and what it changes in response to, can help diagnose illnesses and develop treatments. Researchers develop a system to grow mucus-producing intestinal cells and study ...

When to worry: Seek medical help if your cough brings blood, causes severe breathlessness, or persists with weight loss, fever, or voice changes. Why it lingers: Post-infection inflammation, allergies ...

Cervical mucus is fluid produced by glands within the cervix. Throughout your menstrual cycle, cervical mucus changes consistently because of hormonal fluctuations. When you know what type of cervical ...

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 ...

In 1821, French physician René Laennec wrote, "A spitting pot I consider as an essential part of the bedroom apparatus." Laennec, who invented the stethoscope, spent his days gazing at his patients' ...

Clear, bubbly phlegm does not typically indicate a problem. However, coughing up large amounts could indicate an underlying health issue, such as fluid in the lungs. Phlegm, or sputum, is a type of ...

Nick Blackmer is a librarian, fact-checker, and researcher with more than 20 years of experience in consumer-facing health and wellness content. Extra mucus in your throat and chest is a common ...

Our respiratory system is lined with a thin fluid layer called mucus on the inside. The mucus protects us from inhaling harmful and unwanted airborne agents from germs to pollutants; it achieves this ...