Children with blood clots in the nose usually do not need medication, the primary cause of the bleeding should be explored, and the bleeding point should be carefully searched for under nasal endoscopy. The possible causes of nose bleeding in children are categorized into local and systemic factors. Local factors include trauma, surgery, inflammation of the nasal sinuses, and septal lesions. Systemic disorders may be associated with hematologic disorders, cardiovascular disorders, and acute infectious diseases. It may also be associated with nasal dryness, allergic reactions, and nasal foreign bodies. The nasal bleeding point should be explored endoscopically, the nose should be cleaned with sea saline, and gauze drainage should be placed. If this is still ineffective, the posterior nasal cavity or hidden sites of bleeding need to be examined, and special attention should be paid to the olfactory fissure of the nasal septum and other parts of the nose for examination. If systemic disease is present, active treatment of the primary disease is needed. Children with blood clots in the nose should not be treated on their own and should seek medical attention to avoid serious complications.