Your body naturally makes mucus to protect organs like lungs and eyes. But infections, allergies and pollution can boost ...

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 ...

Black mucus is rare. It can be the sign of a fungal infection, or exposure to pollutants such as coal, dust or cigarette ...

Healthy phlegm is usually clear and runny, but many different health conditions can change the consistency or color. Phlegm, also called sputum, is mucus produced by your lungs that helps protect your ...

Medically reviewed by Jay N. Yepuri, MD Sticky poop may result from a high-fat diet, affecting fat digestion and ...

Bloody boogers form when blood mixes with mucus in the nose and the mucus dries. Various causes may include nose-picking or ruptured vessels. The nose lining is delicate and rich in blood vessels, and ...

People often dismiss a cough as a minor ailment, but sometimes it can be a sign of an underlying problem, especially when ...

Coughing is a natural reflex for clearing the throat and lungs of irritants. Infection is a common cause of a dry cough. Other possible causes include postnasal drip, asthma, idiopathic pulmonary ...

Everyone’s breath has felt not-so-fresh now and again. If a person’s breath smells like mothballs, there’s most likely a medical cause behind it. Most causes of mothball breath are easy to diagnose ...

Cystic fibrosis (CF) is a genetic disorder that causes severe lung damage and nutritional problems in children. Years ago children with the disease were not expected to survive beyond their teens, but ...

Cystic fibrosis (CF) is a rare autosomal recessive disorder that affects numerous systems of the body. It is a complicated disease that differs from person to person. An autosomal recessive disorder ...