http://www.nhs.uk/Conditions/Nosebleed/Pages/Causes.aspx http://www.nhs.uk/Conditions/Nosebleed/Pages/Causes.aspx http://www.nhs.uk/Conditions/Nosebleed/Pages/Causes.aspx minor injury http://www.nhs.uk/Conditions/Nosebleed/Pages/Causes.aspx http://www.nhs.uk/Conditions/Nosebleed/Pages/Causes.aspx