I don't think it really matters how you tell them. If you have a good or fairly good family, then they will respond with care no matter what. However, here is a sample script you can use or customize:"Hey, when you have some time, can I talk to you about something important? I really don't want you to be angry or to be judged. I just need you to listen."Then, when they are able to talk, you can say something like:"As a reminder, I don't want you to get upset or to judge me. I just need you to listen. I don't always feel good sometimes. I am not even sure why I do what I do sometimes, but I have been hurting myself. I think it makes me feel better if I do it, but I also know it's harmful. I want to stop doing it though and need help."Remember, you can customize it to add more to it or to leave out some things. I am so proud of you for wanting to take the first step in communicating with them! It shows that you do have strength. Even adults cannot do this sometimes. Also, I am very sorry that you are going through whatever pain it is you have. There are people who want to help though, and it CAN be helped. Best wishes to you and stay safe please!! <3