Common causes of nosebleeds include nasal irritation from a cold virus, external trauma to the nose, and living in dry climates, according to WebMD. In rare cases, nosebleeds can signify underlying medical conditions such as blood clotting disorders and abnormal blood vessels.
Additional causes of nosebleeds include allergies, bleeding disorders, sinusitis and frequent use of nasal sprays, explains Mayo Clinic. Exposure to irritating chemicals and aspirin use can also trigger nosebleeds. While nosebleeds are not typically a symptom of high blood pressure, the condition may increase the severity of symptoms during a nose bleeding episode. Elderly individuals are more likely to experience posterior nose bleeding, a condition in which an artery in the back of the nose causes blood to drain down the throat.
Applying a cold compress to the bridge of the nose or by pinching the soft portion of the nose for approximately 10 minutes can stop a nosebleed, explains Healthline. Severe or chronic nosebleeds may require cauterization, a treatment in which a physician burns blood vessels with a heating tool or silver nitrate. Prevention methods for nosebleeds include using a humidifier to moisten indoor air and minimizing dryness of the nasal passages by limiting the intake of decongestants or antihistamine medications.