At higher altitudes, the atmospheric pressure is lower than at sea level. This reduced external pressure can cause the tiny blood vessels (capillaries) in the nose, which are close to the surface, to rupture, leading to bleeding. The difference between the internal blood pressure and the external atmospheric pressure increases.
Bleeding from nose is caused when a person is there at :
Asked in OPSC CS Prelims 2020 · Topic: Physical Properties of Materials (Density and Specific Gravity)
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Answer: A. Higher altitudes where atmospheric pressure is low
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