Nosebleeds can be a nuisance.
Or something more serious. It is important to determine which type of nosebleed you are having so it can be treated. Other possible causes include chronic nose-picking, sinus infection, or reactions to such medications as inhalants, aspirin, ibuprofen or anticoagulants. A posterior nosebleed comes from deep in the nose and flows down the back of the mouth and throat, even if the patient is upright. Either possibility calls for treatment.