The common causes of nasal bleeding in babies may be the following: 1. The baby’s nasal capillaries are rich, and nasal bleeding can occur when the nasal cavity is dry, or when the baby blows his nose hard. 2. Some babies have allergic rhinitis, or are prone to recurrent respiratory infections, and the mucous membrane of the nasal cavity is congested and edematous for a long time, so when the nose is gently picked, it is particularly 3, ENT diseases, such as nasal septal deviation, nasal polyps, can also appear nasal bleeding. 4, less common cases, systemic blood system diseases, thrombocytopenia, abnormal coagulation function, can be accompanied by nasal bleeding.