Ever notice how, during a cold, it feels like only one nostril is completely blocked? It’s not just bad luck or an uneven nose — it’s your body’s built-in system at work.
When you’re battling a cold, endless tissue use and constant congestion are frustrating enough.
But why is it usually just one nostril that feels entirely clogged?
Many people assume it’s because their nasal passages are uneven. However, the real reason lies in a natural phenomenon known as the nasal cycle.
What Is the Nasal Cycle?
"The nasal cycle is a process where the mucous membranes and erectile tissue inside one side of your nose swell up, reducing airflow," explains Dr. Michael Deeg in an interview with Fit For Fun, as cited by Freundin.
This swelling alternates between nostrils every few hours, allowing one side to rest and regenerate while the other does the heavy lifting.
During this "rest phase," the inactive side produces less moisture and takes in fewer pathogens, helping the mucous membrane recover. It’s a built-in protection system for your nose, ensuring it remains functional even when you’re under the weather.
Why Do You Feel It More During a Cold?
Under normal circumstances, you probably don’t notice the nasal cycle because both nostrils still allow enough airflow.
However, when you have a cold and your airways are already inflamed, the side that’s "resting" can feel completely blocked, making the cycle more noticeable.
As tempting as it might be to reach for nasal spray to unblock your nose, experts recommend letting your body’s natural self-healing processes take over.
The alternating rest and recovery are crucial for your nasal health.
Quick Tips for Cold Relief
To ease the discomfort of one-sided congestion:
Stay hydrated: Drinking plenty of fluids helps thin mucus and keeps your nasal passages moist.
Try nasal rinses: Saline sprays or rinses can reduce irritation and flush out mucus.
Limit nasal spray use: Overuse can lead to rebound congestion.
The next time you’re battling a stuffy nose and wondering why just one nostril is blocked, remember—it’s your body’s clever way of protecting and healing itself. Let it do its job, and you’ll breathe easy again soon.
