Nose bleeding at high altitude

Hello friends,
Have you ever wondered why mountaineers bleed from nose at high altitudes?See,as we move to higher altitudes the atmospheric pressure drops and due to this considerable pressure difference occurs between the flow of blood inside our body and outside.Therefore blood tends to come out from the possible holes in our body.Another reason associated with this phenomenon can be associated with the fact that at higher altitudes humidity is less which makes our skin dry leading to cracks through which blood comes out.
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