Children who always pick their noses and bleed may be caused by physiological factors and diseases of the nose and blood system. Usually, general treatment and medication, as well as surgical treatment can be used. 1. Physiological factors: children picking their noses with too much force or too long nails, resulting in damage to the mucous membrane of the nasal cavity, the mucous membrane of the nasal cavity is damaged and ruptured, resulting in bleeding. This situation can be first compression to stop bleeding, parents need to be patient to give the child education, cut off the child too long nails, so as not to damage the nasal mucosa again, so as to relieve the phenomenon of children always picking their noses bleeding. 2. Nasal septum deviation: Nasal septum deviation easily leads to part of the nasal mucous membrane tension increases, nasal mucous membrane dry, the child will bleed when picking the nose. Nasal septum correction surgery can be used for treatment, cutting the mucous membrane of the nasal cavity, exposing the deviated cartilage, and clearing away the excess deviated cartilage, so that the nasal septum can achieve the purpose of correction, thus alleviating the phenomenon of children always picking their noses and bleeding. 3. Dry rhinitis: nasal secretions block the nose, the child will directly use the hand to pick, the secretion is dry, remove the damage to the mucous membrane of the nasal cavity, the nasal cavity will bleed. Paraffin oil drops can be used to improve nasal dryness. If the child is always picking his nose bleeding, but also need to be alert to the possibility of blood system diseases, such as aplastic anemia, etc., it is recommended to go to the hospital in a timely manner to find out the cause of the disease after targeted treatment.