Nasal valve collapse makes parts of your nose look visibly narrower, sunken, or pinched, and in many cases you can watch the nostrils cave inward when you breathe in. The exact appearance depends on which valve is affected and whether the collapse happens only during breathing or is present all the time. Here’s what to look for and how doctors confirm it.
Two Types, Two Different Appearances
Your nose has two sets of valves. The internal nasal valve sits about 1.3 centimeters inside each nostril, where the cartilage of the bridge meets the septum. It’s the narrowest part of your entire airway. The external nasal valve is the soft, flexible area right at the nostril opening. Collapse in either location looks different.
External nasal valve collapse is the easier one to spot. You can see one or both nostrils physically sucking inward when you inhale through your nose. The nostril rim develops a concave, scooped-out look instead of holding its natural curve. In more severe cases, the nostrils appear pinched even at rest, as though someone gently squeezed the tip of the nose together.
Internal nasal valve collapse is harder to see from the outside, but it still leaves clues. The middle third of the nose, the area between the bridge and the tip, can look thinner than normal or asymmetrical. One of the most recognizable signs is the “inverted V” deformity: visible shadow lines running down both sides of the bridge where the cartilage has separated or collapsed inward. In one study of patients with confirmed internal valve collapse, 73% had this inverted V appearance.
What Happens When You Breathe In
The most dramatic visual sign is dynamic collapse, meaning the nasal walls buckle inward specifically during inhalation. When you breathe in, negative pressure builds inside the nose. If the cartilage supporting the valve is weak or damaged, it can’t resist that pressure, and the sidewall gets pulled inward like a flimsy straw collapsing when you suck too hard.
This is different from static collapse, where the narrowing is structural and present all the time regardless of breathing. With static collapse, the nose simply looks narrow or sunken at rest. Many people have a combination of both: a nose that already looks somewhat pinched and then narrows further with each breath.
To see dynamic collapse in action, stand in front of a mirror and take a moderately deep breath through your nose. If the sidewalls of your nostrils visibly pinch inward or the middle portion of your nose narrows, that’s the hallmark movement. It doesn’t require a forceful sniff. In clinical assessments, doctors look for collapse during light or moderate inspiration, not just exaggerated breathing.
The Pinch Test You Can Try at Home
Doctors use something called the Cottle maneuver to confirm nasal valve collapse, and you can approximate it yourself. Place one or two fingertips on your cheek, just to the side of your nose near the crease between your cheek and nostril. Gently pull outward while breathing in. If your airflow improves noticeably, that suggests the valve was collapsing and your fingers physically held it open.
In a clinical setting, doctors take this a step further with the modified Cottle maneuver. They use a small instrument like a cotton swab or ear curette to gently lift specific cartilage inside the nose. Lifting the upper cartilage tests the internal valve; lifting the lower cartilage tests the external valve. This lets them pinpoint exactly which structure is failing. The key finding is the same: if propping the cartilage open restores airflow, the valve is the problem.
How It Differs From a Deviated Septum
A deviated septum and nasal valve collapse both cause one-sided or two-sided blockage, but they look different. A deviated septum is a bend or shift in the central wall dividing your nose. From the outside it sometimes shows as a crooked nose, but the nostrils themselves maintain their shape. You won’t see the sidewalls caving in during breathing.
Nasal valve collapse, by contrast, shows movement or concavity in the outer walls, not the center. The nose may look symmetrical from the front but pinched from the side, or one nostril may appear more scooped than the other. That said, the two conditions often overlap. A septum that bows toward one side can push into the valve space and narrow it further, so having one doesn’t rule out the other.
What Doctors See During an Exam
When a doctor looks inside your nose with a small camera (nasal endoscopy), they’re checking how much of the internal structures they can see past the valve. In a healthy nose, the middle turbinate, a small shelf of bone and tissue deeper inside, is easily visible through the valve opening. In a partially collapsed valve, that structure is only partly visible. In a fully collapsed valve, it’s completely hidden because the narrowed walls block the view. This grading system, from Grade 0 (fully visible) to Grade 2 (not visible at all), gives doctors an objective measure of how severe the collapse is.
The normal internal valve angle, the space between the septum and the sidewall cartilage, measures roughly 10 to 15 degrees. That’s already quite narrow. Any further reduction from weakened cartilage, scar tissue, or swelling can tip the balance into symptomatic collapse.
Common Causes That Shape the Appearance
The way nasal valve collapse looks often depends on what caused it. Previous rhinoplasty is one of the most common culprits. If too much cartilage was removed during a nose job, the middle third of the nose can develop the inverted V shadow, and the tip may appear overly pinched. The nostrils might look scooped or retracted along the rim where structural support was lost.
Aging causes a more gradual change. As cartilage weakens over decades, the nose slowly loses its rigid structure. You might notice the sidewalls don’t hold their shape the way they used to, or that breathing through your nose has gotten progressively harder without any obvious injury. Trauma can produce asymmetric collapse, where one side looks noticeably different from the other, either sunken, shifted, or more prone to caving in during breathing.
Some people are simply born with naturally thin or weak nasal cartilage. In these cases, the nose may have always looked somewhat narrow or delicate, but symptoms worsen over time as the cartilage loses elasticity.