Nosebleeds are often seen in dry nasal mucosa, nasal septum deviation, dry rhinitis, and so on. 1. Dry nasal mucosa: mostly seen in the north of the fall and winter seasons, due to the dry air, will lead to increased vascular fragility, it is easy to rupture small blood vessels, thus causing bleeding, especially children themselves, the nasal mucosa is relatively thin, it is easy to lead to nosebleeds. 2. Deviated nasal septum: Mild deviated nasal septum usually does not cause nosebleed, but if the deviated nasal septum is more serious, when exhaling, the impact of the airflow may lead to rupture of blood vessels, causing bleeding. 3. Dry rhinitis: it is a chronic inflammation of the nasal cavity, which will lead to dryness of the nasal mucosa and reduced secretion of the glands, and will easily cause nosebleeds. Love nosebleeds may also be caused by long-term nose picking or atrophic rhinitis, coagulation disorders, hypertension and other diseases. It is recommended to go to the hospital in time to find out the cause and then targeted treatment.