Why does meth change the facial features of the users (see pics)?

Question by Think about it: Why does meth change the facial features of the users (see pics)?
I don’t know if these pictures are real but they are before/after shots of the face of a meth user. Also why do they get blisters on their faces? Is this real?
http://www.drugfree.org/Portal/DrugIssue/MethResources/faces/index.html
Maybe these pictures are fake because if you look at the guy on the 3rd row/3rd picture, how could he have more hair on his balding head after using meth? That doesn’t look right, right?

Best answer:

Answer by johhny
hmm i dont know..chemical inbalance probably

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