"Both meth and heroin are often cut with sugar, McLellan explains. “And you get acne from oily or sweet things, so if you’re injecting the sugar into your veins it’s even more direct,” he adds.
Other impurities can cause lumpy cysts on the face and other areas of the body, such as the armpits and groin, McLellan says.
The gaunt look on many of the addicts can be the result of poor nutrition and lack of sleep, says Dr. Larissa Mooney, an addiction psychiatrist and an assistant clinical professor of psychiatry at the University of California, Los Angeles.
As for the facial sores: Sometimes meth users will hallucinate and get the sensation that there are bugs crawling under their skin, Mooney says. Trying to get relief, they’ll sometimes pick at their skin until there are open sores."
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