When there is bleeding from the nose(nostrils) the following steps are to be followed:
Let the victim sit on a comfortable place such as chair
Lem him receive fresh air
The vitims head shold be bent backwards slighthly so as to reduce or prevent further loss of blood
The victim should be encouraged to breath through the mouth and not through the nose to reduce or prevent loss of blood and also to promot clotting. The nose is pinched for minutes.
Use cotton wool or tissue paper to remove blood from the notrils and push in some of the cotton wool or tissue paper into the nitrils to absorb blood. The blood soaked cotton wool is removed at interval and new cotton wool is pushed in until bleeding stops.
The nose must not be blown, as doing so will promote bleeding.
Apply pressure point. Press the carotid artery against the jaw bone to reduce bleeding
Send the victim to hospital for medical treatment.
http://www.fineyemiblog.com/2016/12/nose-bleed-how-to-take-care-of-nose.html

what's carotid artery??

@Op I think you made a mistake- the victim's head should not be bent backwards to prevent aspiration and swallowing of blood. *just like in the pic*

Other than that great job. Applying pressure to the carotid artery is completely new to me.

Do you mind posting the source? I would love to read more on it.