Problems in the lungs can cause phlegm to change color. Green or yellow phlegm can occur with an infection, but brown phlegm might indicate bleeding in the lungs. Phlegm is a type of mucus that comes ...

Watching your toddler struggle with thick mucus or noisy breathing can be worrying for any parent. Phlegm buildup is a common part of colds allergies or mild respiratory infections—but when it lingers ...

Drinking plenty of fluids can help decrease the thickness of phlegm and make it easier to remove. Bloody, brown, white, yellow, or green phlegm may be a sign of an underlying condition or infection.