What the Color of Your Snot Says About Your Health

Allergy season is here, and with it come the sniffles, sneezes and the inevitable moment when you glance at a tissue and wonder, “Wait…is that color normal?” 

We’re talking about mucus. Yep, snot. It may not be glamorous, but the color of your nasal discharge can actually offer some insight into what’s going on inside your body. As pollen counts rise and tissues pile up, here’s your quick guide to what your snot might be trying to tell you. 

The Snot Color Decoder 

Clear: Clear mucus is usually a sign of a healthy, well-hydrated nose. But it can also show up when allergies flare or when a cold is just getting started. 

White: Thicker, white mucus might signal inflamed and swollen nasal tissues—often a sign of congestion from a cold. 

Yellow: When your immune system kicks into gear, your mucus may turn yellow. It doesn’t necessarily mean something serious—just that your body is fighting something off, like a cold or mild sinus infection. 

Green: This one gets the most attention. This snot color can indicate a stronger immune response and possibly a bacterial infection, but it’s not a surefire sign.

Red or Brown: Spotted some pink, red, or rusty tones? You’re likely seeing blood, often caused by irritated nasal passages or dry indoor air. A humidifier may help, but if bleeding persists, get it checked. 

Black: Rare and worth noting. Black mucus could be due to inhaled smoke, dust, or pollution. But it can also signal a fungal infection or more serious health issue, especially if you have a weakened immune system. Best to get this one evaluated. 

When to See a Doctor 

Most snot color changes are harmless and go away on their own. But if symptoms stick around for more than 10 days, you develop a fever, or you experience facial pain or pressure, it’s time to check in. Your primary care provider can help determine whether it’s time for treatment.

So the next time you blow your nose and pause for a quick color check, don’t panic. Your snot might just be trying to tell you something. And if you have questions or need support this allergy season, Covenant Health is here to help. 

Don’t have a primary care provider? Find one near you.