What causes nosebleeds in children: Nosebleeds are more common in babies because the fine blood vessels in the nasal mucosa are very densely distributed, and most of them are concentrated near the inner side of the nostrils. They are very fragile and can easily rupture and cause bleeding. Epistaxis usually occurs when the nose is dry, when the baby rubs and picks the nose, or when the nose is blown hard. It is often more likely to occur when washing the ears or lowering the head, and some babies are also sleeping…