Here is a link to the article on the main site about infection,
http://www.recoveryourlife.com/index.php?categoryid=90
But I agree with Emmabob, green generally means that something is not right and you need to seek a medical opinion on the wound.
This may sound harsh but if you make the decision to self harm you have to be prepared to deal with the consequences, eg seeking medical attention, or you parents finding out or infections. And to be perfectly blunt, why post for advice if you are not prepared to follow it?