Occasional, small nosebleeds may be due to dryness in the nasal passages from the cold air outside, as well as the dry heat inside. The nasal mucosa may become irritated due to the dryness, causing a bloody nose. Keeping the nasal passages moist helps to decrease the chances for a nose bleed. The use of nasal saline spray several times a day may help significantly. It is not a medication, rather a moistener for the nasal lining. Of course, there are other causes for nosebleeds, such as high blood pressure, injury, etc., so if your nosebleed produces more than a small amount of blood or clots, or occur frequently, you should contact your doctor. How to stop a nosebleed? Pinch the nostrils midway down the nose, with your neck forward (not back) for a few minutes at a time.