"It's like a crawly feeling inside," says Judy*. "You get hot, then chilled, and you feel like you want to run away." The 57-year-old has short dark-grey hair and a haunted expression. She's breathless and sits with her right leg balanced up on her walking stick, rocking it back and forth as she speaks.
Judy explains that she suffers from constant, debilitating pain: arthritis, back problems, fibromyalgia and daily migraines. She was a manager at a major electronics company until 2008, but can no longer work. She often hurts too much even to make it out of bed.
She's taking around 20 different medications each day, including painkillers, antidepressants, sedatives and a skin patch containing a high dose of the opioid drug fentanyl, which she says did not significantly help her pain and which she's now trying to come off. Her physician has been tapering the dose for months, so in addition to her pain she suffers withdrawal symptoms: the chills and crawling dread. Then her clinic announced that it would no longer prescribe any opioids at all, the unintended result of new, stricter measures aimed at clamping down on opioid abuse. Faced with losing access to the drug on which she is physically dependent, she has come to another clinic, Pain Consultants of East Tennessee (PCET) in Knoxville, desperate for help.
Ted Jones, the attending clinician, calls patients like Judy "refugees". He says that he sees "tons" of similar cases. Over 100 million Americans suffer long-term pain. Now they find themselves at the epicentre of two colliding health catastrophes in the USA: chronic pain and opioid abuse.