It’s that season again when many are battling colds and frequently reaching for tissues. Perhaps you’ve been experiencing sinus issues or noticed that your nasal discharge looks unusual. Regardless of the situation, it’s clear that mucus is prevalent during this time.

“Mucus serves an essential function by keeping our airways moist and collaborating with our immune system to combat irritants, infections, or inflammation,” explained Dr. Stephen Vogel, a family medicine physician at PlushCare. “For the majority, healthy mucus appears clear to white.”

If your nasal discharge deviates from this norm, it could indicate underlying issues, from allergies to more serious health concerns. We consulted medical professionals about the meaning behind your mucus’s color and texture, as well as guidance on when to seek medical advice.

Yellow Mucus

When your mucus turns yellow, it often signifies that your body is responding to an infection. This coloration is typically the result of white blood cells combating bacteria or viruses.

“Yellow mucus may also thicken or become more concentrated as your immune system becomes activated,” said Dr. Brynna Connor, a family medicine doctor and health care representative at NorthWestPharmacy.com. “Potential triggers for yellow mucus include the common cold or bacterial infections like sinusitis (sinus infection) or bronchitis (respiratory infection).”

Green Mucus

Green mucus might imply you are dealing with a more severe bacterial infection. “The green hue is due to enzymes released by white blood cells as they combat the infection, typically indicating a more intense or prolonged immune response,” Connor noted.

Possible causes for green mucus include bacterial sinus infections, bacterial bronchitis, or pneumonia. However, it’s worth noting that green mucus can also be the result of mucus lingering in your sinuses for an extended period.

Brown Mucus