You can only tell if you have seen the cut marks often found on the arms and wrists. They tend to hide it by using long sleeves and accessories that can hide it.
Do you mean cutting your wrist?
Your wrist
Cutting, but drugs are a close second. If you are a cutter, please tell someone. You need help.
No, not at all. Something causes you to do that in your life.
Please specify your question.
Self injury is never ever a good idea if you or someone you know is cutting yourself/themself you should call a self help line, or tell someone so they can help you.
WikiAnswers does NOT give advice on how to harm your body. PLEASE do not cut yourself. If you have a problem, cutting yourself would not solve it! It will just make matters worse. Talk to someone that you believe could understand you. Again, please DO NOT CUT YOURSELF!
Wrist cutting is known to give you Syphilis, Hepatitis type B, HIV/AIDS, Swine and Bird flu, Chronic nausea, Cold, Runny nose, Brain and liver tumors, blue balls, cold feet and death.
Your wrist bleeds, and you don't care as much. The drinking will have little effect on the bleeding, but it may well be part of the problem insofar as the cutting is concerned.
By Falling on it or something hard hitting it..eg if someone hit your wrist hard with something.
... To tell the time.
Skillet's song 'The Last Night' has the lyrics, 'You come to me with scars on your wrists".Most Christian bands do not sing about anger and cutting their wrists because they are angry.