What are noticeable signs of someone using crystal meth?

Question by kindofkitty: What are noticeable signs of someone using crystal meth?

I don’t think the person I was wondering about has an isssue with meth now. He had mentioned using before a long time ago. So I was thinking when he became a little withdrawn and having back pains that I would look into the signs of meth use. I don’t believe he’s using, the other symptoms don’t fit. thanks for the great answers.

Best answer:

Answer by Freedom
the most obvious is the staying up for days on end. That’s a huge indicator.

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