Self-harm is no joke.
You'll always hear how cutters are "Emo" or "Attention seekers". But it isn't a joke, it takes a lot to turn Mental pain into Physical pain. So when you stand there, not helping them but Bullying them until they roll down their sleeves and hide their skin even more. You're pushing them further and further down a hole. And if you aren't careful with what you say, then that hole turns into their Grave.