When you have one blocked nostril, how come it switches to the side you sleep on yet it doesn’t drain out when you sit vertically/stand up or how come it doesn’t come out when you try to blow it out?

Question

When you have one blocked nostril, how come it switches to the side you sleep on yet it doesn’t drain out when you sit vertically/stand up or how come it doesn’t come out when you try to blow it out?

In: Biology

Answer 1

If you flare your nostrils a few times, both nostrils will open up for a while. Since I learned this I’ve been doing it before sleep every night for comfort.