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

A cough can feel like a particularly annoying symptom to deal with, especially if it’s keeping you awake at night or lingering for weeks on end. But there’s probably a good reason you have that cough ...

Mucus, a fluid in your upper respiratory system, is usually clear. But a number of health conditions can cause it to turn brown. Also known as brown phlegm or sputum, brown mucus can be due to a range ...

When a persistent cough disrupts your sleep and drains your energy, it might be more than just a stubborn cold. Pneumonia, a serious lung infection, affects millions of Americans each year and can ...

Your lungs produce mucus every day to trap dust, germs, and irritants. Normally, this mucus is thin and moves out of the airways with little effort. But when you have a cold, allergies, asthma, ...

Parents facing their child’s persistent cough often feel helpless, especially when over-the-counter medications are not recommended for children under 6 years old. Pediatric healthcare professionals ...