Children’s noses are prone to nosebleeds may be caused by physiological factors such as dry weather, or may be caused by thrombocytopenic purpura, aplastic anemia and other diseases. 1. Physiological factors: If the weather is dry, it may trigger dryness of the mucous membrane of the nose, leading to local blood vessel rupture and bleeding. 2. Thrombocytopenic purpura: the cause of thrombocytopenic purpura may be due to immunity, heredity and primary diseases, which is mainly manifested as petechiae and ecchymosis of the skin and mucous membranes, accompanied by bleeding from the nasal cavity and gums. 3. Aplastic anemia: the formation of aplastic anemia may be genetic, viral infections and radiation, immune abnormalities and other factors, clinical manifestations of progressive aggravation of anemia, infections, and bleeding and other symptoms, some patients will appear nose, oral mucosa and other places bleeding. There are many reasons why children’s noses bleed easily, and after eliminating physiological factors, parents are advised to take their children to the doctor for examination to clarify the cause.