Children’s nosebleeds with blood clots may be caused by dry weather, but also may be caused by deviated nasal septum, leukemia, and other reasons such as nasal trauma. 1. Dry weather: If children are in a dry environment for a long time, the nasal cavity may become dry, and then the blood vessels in the nasal mucosa of the patient may rupture and bleed, and the patient will have symptoms of nosebleed. In addition, blood clots will appear after the blood in the nasal cavity is condensed, which is a normal physiological phenomenon and does not need treatment. 2. Deviated nasal septum: Deviated nasal septum may be caused by abnormal development of nasal bone, occupational lesion of nasal cavity, heredity and other reasons. Patients will have symptoms such as nosebleed, headache, nasal congestion, etc. If children have deviated septum, it will be manifested as nosebleed with blood clots. 3. Leukemia: The cause of leukemia is still unclear, considering that it is related to heredity, viral infection, physical factors, abnormal immune function and other factors. If a child develops leukemia, he will not only have symptoms of nosebleeds with blood clots, but also have anemia, fever, swollen lymph nodes and other manifestations. 4. Other: Nosebleeds with blood clots in children may also be caused by nasal trauma, nasal tumor, dry rhinitis, sinusitis and other diseases. It is recommended that children with nosebleeds need timely medical attention, if it is due to dry weather, no treatment. If it is a disease caused by the child nosebleed, you need to choose the appropriate measures under the guidance of the doctor to treat.