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yEAH

as a "former" cutter i don't know what to say
i don't know what would help or hurt because everyone cuts for different reasons, i would highly suggest if you can contacting a family member of their's or suggesting they seek help, even a suicide hotline might be worth a shot.

They likely need therapy tho

then they probably have a mental health problem and need some serious help

tell em' it's not worth it to cut, and that a better substitute is to cry it out, or idk????? something that isn't harmful to them. i know from experience that sometimes the best thing to do is to just cry it out. Even if they still feel like s**t, it's a whole lot better than waking up the next morning and trying to think of ways to hide it... its a temporary fix that only ends up prolonging the problem. Seeing the scars day after day after they heal is more likely to trigger a relapse. Just tell them to cry it out, and let it out in a non-harmful way... screaming into pillows, punching pillows, taking showers... its a helluva lot better than cutting.