Shanaynay,
I was a very mild cutter when I was a teen - probably not even considered a cutter in todays scene. I wasn't even aware that it was a dangerous thing to do because I never discussed it with anyone. I never cut deep and was a bit of a wuss so I only did it very occasionally when things seemed so bleak to my hormonally raging emotionally wracked young body. I was as screwed up as any other 'normal' teen. We all go through this. I was very introverted for several years and it was around this time that I got a scratch accidentally. My attention was focused on the scratch, I picked it when it scabbed over and I cannot explain how it eased me just a smidge to have this silly scratch to focus on rather than things that my head just couldn't get a handle on. When it completely healed, and I was next going through a bad patch, I deliberately scratched myself again. I wanted my attention diverted again so I could find some relief. Then it becomes a habit. A need. A necessity. You feel that you cannot get through a week, a day, a few hours without seeing the fresh blood and feel a tiny bit of power over yourself and things around you. It took me some time to realize that it was happening too often and that I had to stop. I had to wean myself off.
I think you need to sit down (if possible) and talk to a counsellor and other like-minded young people who cut. I never did, but I regret not opening up and asking for help, my misery might have been reduced if I had. I never thought much of it until years after when I heard about other cutters and I realized I had been one of these people. I really thought that it was a shameful thing I would never admit to anyone. I likened it to smoking, and not being able to quit because I was addicted. However it is probably more similar to Anorexia (as someone previously mentioned above), in that it is you asserting some semblance of control, but it is a control this is harmful and not as rewarding to you in the smidgeon of relief you expect it to give you. I finally found another outlet in comedy. Now I am not really a funny person but I started to goof around for friends, and began to come out of my shell somewhat. I started to be noticed and began to feel more confident. I also started to stand up more for myself. I began telling myself that I was the most important thing in my life and I was worth something - more than the pain that I inflicted on myself because of what-ever reason. Then something strange happened, I found I could find other ways of resolving issues when they came up. I never resorted to cutting or hurting myself again and I realize now that it was a phase I went through where I was so frustrated, helpless and alone with my teenage confusion that it was an outlet for me. Drugs can be an outlet. Anorexia can be an outlet. Many things can be an outlet. Who is to say when any of us choose the thing we do. Many others are very lucky and have ways to get through the teenage years without having to resort to such things. But it is not as unusual as you might think.
As for parents, well that wasn't an option for me back then. My father was never around and never talked to us. My mother was generally on a tirade most days and unapproachable. We walked on eggshells around her at that time (I think she had her own issues back then). I didn't share it with friends or my sisters. I don't discuss it with anyone now because well, I'm over it, it doesn't seem so important now. But you are going through it now and you are unable to cope with it and I am remembering how I felt back then. You cannot imagine ever feeling better, ever being able to get a handle on things and it is so difficult to do without someone else to help you.
You are not a nutcase. You are hurting inside and, to stop that emotional hurting, you are hurting yourself physically so that you have a real-visible-thing to focus on. You have to stop. I get the impression from your postings that you are a mild to moderate cutter. If you are a more serious cutter then I am out of my league here and am willing to admit it. There could be more issues here than I know what to do with and I am no professional or expert at the subject, so don't think I have all the answers here - I don't.
You really do need to talk to someone. There has to be someone in your life that you can reach out to. If you could find a center that deals with something like this - having them bring your parents in to explain what self-injury is. It is not going to be easy, which is why you need someone to help you through. It would be wonderful if your parents could be the ones helping you but if they don't understand then perhaps someone professional to explain and assist would help. Make a call to the local emergency room and see if they have any staff who are familiar with SI and might be able to help or try one of these
places for pamphlets, telephone numbers you can call, anything that will help you get the help you need.
You WILL come out the other side of this - you have to hold on to that thought and start looking for another avenue to regain control of your life, a non-harmful avenue.