Ed Mowery, the founder and lead singer of a death metal band, suffered unfathomable pain for decades: "It was 24/7, 365," he said, likening it to "lightning bolt razor snakes in my legs and nerve pain in my arms.

"Have you ever had a really bad burn when you're cooking? Imagine that really bad burn, multiply it by, say, 20 to 30, and then apply it from the neck down. And on top of that burn was the lightning bolt razor snakes in my legs and the crazy nerve burn in my arms. So, it was several different kinds of pain at once."

For decades, heavy metal musician Ed Mowery suffered excruciating pain. CBS News

It's a rare condition affecting 200,000 people in the U.S., called complex regional pain syndrome, or CRPS. But doctors could find no cause for it.

"There was nothing to point to an

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