Nose bleeds after a cold with blood in the nasal mucus, may be related to capillary rupture, blowing the nose with too much force and so on. 1. After a cold, the nasal mucosa is easily congested and swollen, and the capillaries become very fragile, and due to the stimulation of inflammatory factors, it is easy for the capillaries to rupture, which will cause bleeding symptoms. 2. Cold and flu in general will be more nasal snot, blowing the nose when the force is too much, in the role of the impact of the airflow will make the mucous membrane and capillary rupture, causing bleeding and blood in the snot. It is recommended to go to the hospital in time for examination after a cold, according to the cause of the cold and the symptoms of nosebleed targeted treatment, and drink more water, which is conducive to the recovery of the cold.