Sometimes i use cocaine to release from the stress or when im in party. after i get i have nose bleeding.is something serious?

Yes: Cocaine usage can cause serious problem. Nose bleed is a minor problem if it is very little but it can turn into a major problem since Cocaine can cause hole in your nasal septum. Also it doesn't matter it is your first time or you have been using for a while, Cocaine can cause heart problem like heart attack.

Nose bleed: Yes. The most serious is the Cocaine use itself. It is a stimulant , and can trigger all sorts of rebound anxiety, stress, depression etc especially in someone your age. So figure out a way to have better habits. In terms of nose bleeds it is a potent blood vessel irritant so you are damaging the lining in your nose.

Yes: This can lead to major problem . And u need to stop this . If u can't do it seek a health care professional help.