The most common cause of epistaxis in children?
The overall most common cause of epistaxis is idiopathic. In children, the most common cause is traumatic after nose picking. upper respiratory tract Infections lead to dryness, crusting and irritation which on removal by nose picking lead to epistaxis. (Ref: Cummings, 6th edition, pg no. 680 )
Common cold
Nasal allergy
Polyp
Habitual nose picking
Nose and paranasal sinuses