A nosebleed can be categorized into two broad groups according to their origin. Anterior nosebleeds are more common and are caused by injury or strain to the blood vessels around the nasal septum, whereas, posterior nosebleed occur due to a rupture in the artery at the back of the nose. It is difficult to diagnose the cause of nosebleed, however, injury to the nose the most common factor. Other conditions that predispose a person to nosebleeds include exposure to warm, dry air, nasal and sinus infections, allergic rhinitis, nasal foreign body, in some instances, an underlying disease process or prescription medications may cause a nosebleed. A minor nosebleed that has stopped may not require any treatment. Lowering the head or pinching the nose usually, reduces the bleeding within a few minutes. Ice packs can also be used to soothe the symptoms. A clot may form at the site of the bleeding. If the ruptured blood vessel is easily seen, the doctor may cauterize it with medications like silver nitrate after applying a local anesthetic inside the nose. Anterior nosebleed, often, resolves on its own without any medical intervention. In more complicated cases, a nasal packing may be required to stop the bleeding. Nasal packing accelerates the clotting process to subside the bleeding. Several types of nasal packing are available, including petroleum gauze, balloon nasal packs, and synthetic sponge packs. Packing blocks the nasal passage and may infect the sinuses, antibiotics may be prescribed by the ENT, in such cases. You should consult a doctor immediately if episodes of nosebleed become frequent and persistent. Medical intervention should also be sought if the patient is taking blood thinning medications for some other medical condition.