Definition
What Is the Nasal Valve?
The nasal valve is the tightest segment of your nasal airway, the place where even a small change in shape has an outsized effect on how well you breathe. Think of a drinking straw. Pinch it slightly, and pulling air through becomes a real effort. Your nose works the same way.
There are two valve areas. The internal nasal valve sits deeper inside, where the upper lateral cartilage meets the septum. The external nasal valve sits near the nostril rim. When either one weakens, the sidewall of the nose can cave inward as you inhale, a problem doctors call nasal valve collapse.