Question

sometimes while moving high up a hill , the nose start bleeding. why ​

Answer 1

Answer:

Nosebleeds can be caused by being up in a very high altitude. As you climb higher, the amount of oxygen in the air decreases. This makes the air thinner and dryer, which can in turn cause the inside of your nose to crack and bleed.

Answer 2

Answer:

Because at high altitude , the amount of oxygen starts decreasing . That is why , hill climbers take an oxygen cylinder with them while climbing a hill/ mountain .