Dizziness after nosebleed is firstly considered to be caused by the insufficiency of blood volume and blood supply to the brain due to the large amount of nosebleed. Secondly, dizziness after nosebleed is also considered to be caused by the patient’s nervousness and anxiety after seeing the nosebleed, and it is suggested that the patient can check the blood analysis to check the hemoglobin level if necessary. For frequent nosebleeds, it is generally due to the patient’s cold or nasal inflammation, coagulation dysfunction or bad habits, such as repeated frequent nose picking, etc., can lead to nasal capillary or mucosal rupture, thus causing nosebleeds. For these patients, it is important to avoid the bad habit of frequent nose picking, and if necessary, consult an ENT. Use some drugs to protect the mucous membrane rupture, also suggest that the patient usually drink more water, to avoid the phenomenon of insufficient blood volume after the nosebleed.