Stopping chronic pain before it starts: Surprising biological pathway may play key role
Chronic pain is one of medicine's most stubborn puzzles. A sprained back, a surgical incision or a pinched nerve heals—and yet, for millions of people, the pain never fully goes away. Why some injuries fade into memory while others evolve into a lifelong condition has remained largely a mystery.

<p>Chronic pain is one of medicine's most stubborn puzzles. A sprained back, a surgical incision or a pinched nerve heals—and yet, for millions of people, the pain never fully goes away. Why some injuries fade into memory while others evolve into a lifelong condition has remained largely a mystery.</p>