"meth mouth," leaves users' teeth black-stained, rotted and often unsalvageable.

The stripping of enamel from the teeth, caused by prolonged meth smoking. The teeth, lacking enamel, then rot at a much faster rate, often turning black and infecting the gums.

A condition present in meth smokers where teeth rot and fall out.A few theories exist as to what causes this;

1) Meth dries out your salivary glands thus making them more vulnerable to the acidic nature of the drug.

2) People drink sugary soda and eat candy to alleviate the dryness,and ignore their hygiene as a result of the addiction.

3)or they habitually grind their teeth.