Why does the nose of some people start bleeding when an aeroplane climbs up suddenly?

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Solution

With increasing altitude the air pressure decreases, this disturbs the internal and external pressure balance. This disturbance causes the internal body pressure to be more than the outside air pressure. So, as a result of that nose starts to bleed, but this doesn't happen all the time.

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Similar questions

Why does the nose of some people start bleeding at higher altitude

Why does nose start bleeding on high mountains ?

If you climb a high mountain without proper equipment, your nose will start to bleed. Why?

Why do we see this happening?

(a) People look up when an aeroplane passes overhead, high up in the sky.

(b) When a beam of light flashes on the eyes, the eyes close quickly.

(d) If somebody shouts suddenly right behind us, we get startled.

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