Phlegm is naturally clear. So, if your phlegm is a different color, such as yellow or green, you may have a viral or bacterial infection. Brown, red, or black phlegm may be a sign of a more serious ...

Phlegm. Mucus. Sputum. These are different names for the slimy, slippery stuff that flows out when you cough, sneeze, or sniffle. This gunk is your body’s defense weapon against infectious microbes ...

Mucus is a normal part of the lungs. But smoking and other issues can cause too much mucus to collect there. (Photo Credit: iStock/Getty Images) Your body makes about a liter (approximately 1 quart) ...

Confirming widespread beliefs by doctors and parents alike, the color of phlegm coughed up by people is indeed a good indicator of whether that person has a bacterial infection, an international group ...

Bronchitis happens when your bronchial tubes become swollen and inflamed. Your bronchial tubes are responsible for delivering air from your windpipe to your lungs. Bronchitis makes it harder for air ...

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 ...

Coughing up bloody mucus, or sputum, may occur due to a mild respiratory infection, but it may also be a sign of a more severe condition, such as bronchitis. Doctors may refer to it as hemoptysis.

Bronchitis is caused due to irritation, inflammation and infection of the airways in the lungs called the bronchi. There are basically two major types of bronchitis:- Acute bronchitis – this lasts for ...