In a nutshell
In some people, part of the nasal wall pulls inward during inhalation. If this narrows the narrowest section of the nasal passage, nasal breathing can become difficult.
Why does it happen?
Inhalation creates a pressure gradient in the nasal passage. A less stable sidewall can yield to this pull. The airway then narrows further; anatomy, age, injuries, or previous operations can affect stability.
Frequency
Clinically meaningful nasal valve collapse cannot be equated with every visible movement of a nostril. A reliable general population rate is unavailable; patient groups studied do not represent everyone.
Frequency is a qualitative description, not your individual probability.
Is it normal?
Slight movement of a nostril alone does not prove pathological collapse.
When to seek advice
Persistent difficulty breathing through the nose, symptoms after injury, or troublesome sleep problems should be assessed by an ear, nose, and throat specialist.
Does this happen to you?
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Sources (1)
- Nasenklappenkollaps: Symptome, Ursachen und Untersuchung (opens a new tab)
The source describes nasal-valve instability or narrowing as a cause of impaired nasal breathing.
Editorial update: . AI-assisted research and editing; not individually reviewed by a physician. How we research
