Congestion shows up as a combination of visible signs: swollen nasal passages, puffy skin around the eyes and cheeks, changes in mucus color and thickness, and in the case of chest congestion, altered breathing patterns you can see from the outside. What you notice depends on where the congestion is and how severe it’s become.
What Happens Inside a Congested Nose
The stuffy feeling of nasal congestion isn’t caused by mucus alone. The blood vessels lining the inside of your nose expand, which makes the surrounding tissue swell. Structures called turbinates, the ridges of tissue inside each nostril, become engorged with blood and balloon outward, partially or fully blocking the airway. Normally these blood vessels contract and expand to regulate mucus flow, but when they’re triggered by a cold, allergies, or irritants, they dilate too much and stay that way.
If you could look inside a congested nose, you’d see tissue that appears red, puffy, and wet rather than the pale pink of a healthy nasal lining. In chronic cases, the swelling can become severe enough to physically narrow the nasal passages on both sides, and the mucous membranes may dry out and crack from the persistent inflammation.
What Mucus Color Tells You
Mucus is one of the most visible signs of congestion, and its color shifts as the underlying cause progresses.
- Clear: Normal or early-stage. Healthy mucus is mostly water with proteins and antibodies. Allergies often produce large amounts of clear, thin mucus.
- White: A sign that congestion has set in. Swollen nasal tissue slows mucus flow, causing it to lose moisture and turn thick and cloudy. This typically shows up early in a cold or nasal infection.
- Yellow: The infection is progressing. White blood cells rush to fight it off, and their remnants give mucus a yellowish tinge as they’re swept away.
- Green: Your immune system is in a full fight. Thick green mucus is loaded with dead white blood cells. If this persists beyond 10 to 12 days, it may point to a bacterial sinus infection.
- Pink or red: Nasal tissue has broken somewhere, usually from dryness, irritation, or frequent nose-blowing. A few specks of blood in your mucus are common during a bad cold and not necessarily a concern.
- Brown: Often old blood or something inhaled, like dirt or dust.
- Black: Typically from inhaling debris in a workplace. In rare cases, it can signal a serious fungal infection, but this is exceedingly uncommon.
Visible Signs on Your Face
Congestion doesn’t just stay hidden inside your sinuses. When the sinus cavities behind your face become inflamed and filled with fluid, the swelling can show up externally. The area around your eyes and along your cheeks may look visibly puffy, and skin in those areas can feel tender or warm to the touch. This puffiness tends to be most noticeable first thing in the morning, after fluid has pooled overnight.
Sinus pressure often creates a characteristic look: slightly swollen under-eye bags, redness or discoloration around the eyes, and a general puffiness across the bridge of the nose and upper cheeks. The swelling and pressure typically get worse when you bend forward, which is a quick way to distinguish sinus-related facial puffiness from other causes. In more severe cases of sinus infection, you may notice distinct redness or swelling concentrated around one eye, which warrants prompt medical attention.
What Chest Congestion Looks Like
Chest congestion is harder to see than nasal congestion, but it does produce visible signs, especially in children. When mucus or inflammation partially blocks the airways in the lungs, the body works harder to pull air in. You can often see this effort from the outside.
The most telling sign is intercostal retractions: the skin between and below the ribs visibly pulls inward with each breath. This happens because reduced air pressure inside the chest, caused by a partially blocked airway, sucks the muscles between the ribs inward. In infants and small children, you might also notice the nostrils flaring with each breath, or the skin at the base of the throat dipping in as they inhale. These visible breathing changes signal that the airway is working against resistance and are worth taking seriously, particularly in young children.
How Ear Congestion Appears
Ear congestion happens when fluid builds up behind the eardrum, usually because swollen tissue in the back of the throat blocks the tube that normally drains the middle ear. You can’t see this from the outside, but a doctor looking through an otoscope will see characteristic changes: the eardrum may bulge outward instead of sitting flat, and the normally translucent membrane turns opaque or cloudy. In some cases, visible fluid levels or air bubbles appear behind the drum. The eardrum may also look red or inflamed. While you can’t diagnose this at home, the feeling of fullness, muffled hearing, and pressure in the ear are the external cues that fluid has accumulated.
Acute vs. Chronic Congestion
How congestion looks changes depending on how long it has been present. Acute congestion from a cold or sinus infection lasts less than four weeks and tends to produce the dramatic symptoms: bright-colored mucus, noticeable facial swelling, and obvious stuffiness. The tissue inside the nose appears red and actively inflamed.
Chronic congestion, defined as symptoms persisting beyond 12 weeks despite treatment, often looks more subtle but causes more structural change. The nasal tissue may appear pale or grayish rather than red, since long-term inflammation shifts the tissue’s character. Facial puffiness becomes a baseline rather than a temporary flare. Mucus may stay thick and white or slightly discolored without the dramatic color progression of an acute infection. The turbinates inside the nose can become permanently enlarged, creating a persistent narrowing visible on imaging or during an exam.
What Congestion Looks Like on a Scan
When congestion is severe or long-lasting, doctors sometimes order a CT scan of the sinuses. On imaging, congestion shows up as fluid-filled sinus cavities that should normally be air-filled. Healthy sinuses appear dark on a CT scan because air doesn’t block the signal. Congested sinuses appear gray or white, filled with fluid or lined with thickened membranes. In some images, you can see a distinct air-fluid level, a sharp horizontal line inside the sinus where air sits on top of trapped fluid, like a half-filled glass of water. Thickened sinus membranes show up as a white border lining the sinus walls, sometimes narrowing the cavity to a fraction of its normal size.