Frequent nosebleeds can be caused by a lack of vitamin C. Vitamin C is good for repairing the blood vessel walls, and once the lack of vitamin C can lead to an increase in the brittleness of the blood vessel walls, which can easily rupture and bleed under the action of any trigger. Frequent nosebleeds can be properly supplemented with vitamin C, which can play a very good preventive role. The nosebleeds caused by vitamin C deficiency are not too serious and can be stopped by applying cold compresses to the bridge of the nose with ice water or pinching the root of the nose. However, if frequent nosebleeds are more serious, you should go to the hospital to check the cause in time. Common causes include blood clotting dysfunction or reduced platelet count, etc., which should be treated in internal medicine in time. Frequent nosebleeds may also be due to the rupture of relatively large blood vessels inside the nasal cavity, which should be promptly treated by electrocoagulation in the Department of Five Gases.