Dr. Sanjay Gupta explains what we do — and still don't — know about pain

"Pain is a mysterious thing," says neurosurgeon Dr. Sanjay Gupta. But understanding how it works in the body and different kinds of treatment can help you find the right pain relief when you need it.

"Pain is a mysterious thing," says neurosurgeon Dr. Sanjay Gupta. But understanding how it works in the body and different kinds of treatment can help you find the right pain relief when you need it.