Cold nose bleeding is caused by acute rhinitis, the nasal mucosa will be swollen, congestion, and in the process of coughing or blowing the nose will increase the pressure of blood vessels, resulting in rupture of blood vessels, and thus the phenomenon of nose bleeding. Nosebleeds from colds are mainly caused by the inflammation of the nasal mucosa caused by the virus or bacteria that cause colds, which increases the permeability of the blood vessels in the nasal mucosa, and when the nasal cavity is too dry or the pressure on the blood vessels is too great, rupture occurs, resulting in nosebleeds. This is a relatively common phenomenon, the general bleeding is not too much, as long as the cold is cured, it can be cured, do not worry too much. However, if the amount of bleeding is relatively large, you can first use something to plug the nasal cavity to temporarily stop bleeding, and then go to the hospital hospital ENT department for treatment.