When to Worry About a Nosebleed

8) Upper respiratory tract infections

This is also commonly seen in children. Infections as mild as common cold can cause bleeding per nose owing to the thin, fragile walls of blood vessels in this age group.

9) Dry nose

Living in areas where the air is excessively dry like air conditioned offices can cause the humid nasal lining to become dry and irritated causing it to bleed easily.