3 ms·

If you pay attention, one of the nostrils are likely to be more active (as measured in air flow) at a given time and the active nostril will switch side from ti

If you pay attention, one of the nostrils are likely to be more active (as measured in air flow) at a given time and the active nostril will switch side from time to time, perhaps something like every couple of hours.

mcv 6y ago
I think that just depends on which nostril is the least clogged at that particular time.
- kseistrup 6y ago
  It mainly depends on which turbinates are more blood filled at a given time. See e.g. https://en.wikipedia.org/wiki/Nasal_cycle https://en.wikipedia.org/wiki/Nasal_cycle