Children with bloody nose may be dry rhinitis, sinusitis, nasal foreign body and other causes. 1. dry rhinitis: children with blood in the nose may be dry rhinitis caused by children if the environment is dry or high temperature, it will cause the nasal mucosa dry easy to rupture, thus appearing in the case of blood in the runny nose. 2. Sinusitis: children with blood in the nose may also be caused by sinusitis, children with sinusitis, due to long-term stimulation of the nasal cavity by secretions, induced nasal mucosa congestion, erosion, there will be a situation of blood in the runny nose. 3. Nasal foreign body: children because of curiosity toys, paper balls, fruit kernels, etc., stuffed into the nasal cavity, if not removed in time will be secondary infection, resulting in nasal mucosa erosion, thus appearing in the case of nasal discharge with blood. Children with bloody nose may also be other reasons, parents are recommended to take children to the hospital, systematic examination to clarify the diagnosis.