Unpredictable and always inconvenient, nosebleeds can sometimes result in serious blood loss. Generally, most episodes are caused by drying out of the nasal mucosa (lining of the nasal cavity). Nosebleeds usually occur in clusters and are worsened by blood-thinning medicines (including aspirin) and high blood pressure.
Most nosebleeds will resolve with preventative measures and time. Rarely, nosebleeds can be the first signs of a cancer in the nasal cavity. Individuals with frequent nosebleeds should be evaluated by a physician to rule out any serious cause of the bleeding as well as to prevent recurrence. Sometimes, an in-office cauterization of the offending blood vessels can stop the recurrent nosebleeds.