ELI5, why is it that we only breath through one nostril? Also, why does it feel like it’s more evident when laying on bed, about to sleep?

Question

ELI5, why is it that we only breath through one nostril? Also, why does it feel like it’s more evident when laying on bed, about to sleep?

In: 10

Answer 1

When you lay down on bed your blood pressure decreases, so the less activity on body makes the body to relieve itself from functioning thus the nose blockage occurs due to less temperature of body / inactivity of body.