What is the reason for the Nosebleeding?

Answer 1

for nose bleed's 9 out of 10 times it's caused by a dryness in the inside the nose, the nose must stay moist as much as possible, that is the reason that dogs can smell so well because there nose is usually moist, or if you were really heavy into a drug that made you sniff alot, lets hope not though.

Answer 2

you break a vein in your nose...nose sprays can cause them..so can heat...and being wacked in the nose