There are many reasons why children always have nosebleeds, and there may be fragile nasal mucosa, blood system diseases and so on. 1. Fragile nasal mucosa: If the baby has rhinitis, sinusitis, etc., there may be repeated rubbing the nose or even digging the nostrils behavior, which can easily lead to the fragility of the nasal mucosa, resulting in the phenomenon of repeated nosebleeds. 2. Blood system disorders: if the baby also has recurrent fever, anemia and other manifestations, it is necessary to be alert to the presence of blood system disorders, such as leukemia, aplastic anemia and so on. In addition to epistaxis (nosebleed), petechiae and ecchymoses may appear on other parts of the body at the same time. There may be other causes for children’s nosebleeds, so it is recommended to consult a doctor in a timely manner, and after completing a thorough examination to determine the cause of the problem, give targeted treatment or therapy under the doctor’s guidance.