The first thing to realize is that most nosebleeds will stop easily without losing a harmful amount of blood, even though it looks like a lot of bleeding. Start by pinching all the soft parts of your nose together between your thumb and two fingers, press firmly towards the face, compressing the pinched parts of the nose against the bones of the face. Keep your head upright (NOT leaning back, as this will cause blood to be swallowed, which can irritate the stomach) and pinch for at least 5 minutes. If bleeding persists, clear the nose of the clots by sniffing forcefully, apply Afrin or Neo-Synepherine decongestant spray and pinch again for another 5 minutes. If this is not successful, call your doctor and continue to hold pressure.