What a tough place to be, you want to help your sister and you know she needs help, but she is not in a place where she wants help.  And it is hard to help those who do not want help.  Here are some things to possible try...

#1-Tell an adult.  Cutting is dangerous and addictive, as I am sure you know.  The things she is doing to herself are not okay.  Let somebody else know what you saw with her.  Yeah, she will probably be mad at you, but this is too big of a problem to NOT let somebody else know.  Tell a counselor at school or one of your parents.  

#2-Instead of talking to her about it, write her a note letting her know how worried you are for her and tell her if she ever does want to talk about it, she can come to you.  Also in your note please give her the following website, www.yourlifeyourvoice.org and tell her she can email the counselors at that site about her cutting and they will provide her with advice and support about how to proceed.  

#3-Try to keep her busy.  The less time she is alone, the less opportunity she will have to cut.  Try to get her involved at school and in the community with activities that will keep her social and engage her interests.  This will also help raise her confidence.

Self injury is a tough problem, but it cannot be kept silent.  Please let somebody else know what is going on and encourage your sister to get help for herself.  Please take care!

Counselor, Dominic
Boys Town National Hotline-A resource for parents and teens
1-800-448-3000
www.yourlifeyourvoice.org