However, mucus may appear brown due to the "presence of aged blood, airborne irritants such as dust and smoke or pre-existing ...

Regular mucus tends to be thin and slippery, and it is generally a constant presence on a day-to-day basis. Meanwhile, phlegm ...

Mucus lines your lungs, throat, mouth, nose, and sinuses. While it is always present, it can become thicker or change color due to allergies, a cold, or a respiratory infection.

Mucus Color Meanings You’ve likely noticed mucus shows up in a range of colors and textures when you’re sick, sniffly, or congested, or have a condition like a sinus infection.

“In general, darker color can be caused from mucus that has been sitting in the sinuses for a longer time,” explains Dr. Anthony Zabel, MD, a primary care physician at Indiana University Health.

Medically reviewed by Benjamin F. Asher, MD A sinus infection is inflammation of the sinuses, which are the air spaces around your nose, eyes, cheeks, and forehead. It is also called sinusitis.

But mucus changes color, depending on the individual’s environment, in response to various germs and more, ... Nasal rinses, which help clear the mucus from your nose and sinuses; ...

Allergy mucus typically runs clear and thin, while sinus infection discharge tends to be thick, cloudy, and potentially yellow or green. This color distinction provides one of the best clues for ...

Fungal sinus infections—medically known as fungal sinusitis—occur when various fungi invade the sinuses, those air-filled cavities in the head that produce the mucus necessary for clear nasal ...

A sinus infection, ... The swelling makes it hard for your sinuses to drain, and mucus builds up. ... the color of your mucus does not help tell the difference between allergies or sinus infections.