Question

Give reason that mountaineers may suffer from nose bleeding at high altitude....???

Answer 1

because air pressure is very high

Answer 2

some reasons that mountaineers may suffer from nose bleeding at high altitude are as follows:-
As the altitude increases the atmospheric pressure decrease. And the air becomes thinner and there will be very less oxygen athigh altitude. So due to which the blood vessels present inside our their nosebursts and starts bleeding. This is why mountaineers suffer from nose bleeding!