Children always bleed from the same nostril may be related to deviated nasal septum, nasal hemangioma, nasal polyps and other causes, which need to be further differential diagnosis by the doctor. 1. Deviated nasal septum: If the nasal septum protrudes out of one side, bleeding and other symptoms often occur on the protruding side. 2. Nasal hemangioma: mostly unilateral, usually with symptoms such as repeated nosebleeds and progressive nasal congestion. 3. Nasal polyps: If nasal polyps appear in one side of nostril, there may be congestion and bleeding when touching. If the child always bleeds from the same nostril, it may also be related to other reasons, parents are advised to take their children to the hospital in time, to clarify the cause of the disease, and to carry out standardized treatment under the guidance of the doctor, so as to avoid the delay in the condition of the body to bring about adverse effects.