The usual causes of nosebleeds in ten year old boys who wake up early include: dry indoor environment, nasal inflammation and so on. 1. Dry indoor environment: If the indoor environment is too dry when the child wakes up early, it is easy to cause the nasal mucosa to be dry, resulting in an increase in the brittleness of the blood vessels of the nasal mucosa, which in turn leads to nosebleeds. The common bleeding site is the nasal septum, where capillaries are abundant, so bleeding is easy to occur. 2. Nasal inflammation: if the child suffers from allergic rhinitis, vasomotor rhinitis, etc., when getting up in the morning when the cold air or other allergens stimulation, it is easy to cause acute nasal mucosal congestion, edema leading to nasal itching, nasal congestion and other uncomfortable symptoms, prompting the child child digging the nostrils, rubbing the nose of the behavior, it will be prone to nosebleeds. In conclusion, if your child has a nosebleed early in the morning and is accompanied by other uncomfortable symptoms, it should be treated promptly to ensure your child’s health.