Nosebleeds in toddlers may be related to trauma, dry rhinitis, and bleeding in the Leigh area. 1. Trauma: Commonly, such as frequently picking the nasal cavity with fingers and stuffing foreign objects into the nasal cavity, etc., which causes nasal trauma and leads to the appearance of nosebleeds in young children. 2. Dry rhinitis: due to the relative lack of nasal gland secretion, the nasal mucosa is dry, resulting in an increase in the brittleness of the local blood vessels, when the toddler daily rubbing the nose, sneezing, etc., are prone to cause capillary rupture, resulting in the emergence of toddlers with nosebleeds. 3. Ri’s area bleeding: the nasal septum before the lower area of the mucosa under the formation of multi-source vascular network, the mucosa is thin, in the environmental factors, physiological factors and human factors and other factors can be formed within the scope of the diffuse oozing blood. Therefore, young children with nosebleeds need parents to pay attention to, it is recommended to actively seek medical examination, identify the causes and then targeted treatment.