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Fingertips, David Linden explains, are filled with different sorts of sensors for detecting different types of touch, including one that notes texture and fine little bumps. Another type perks up at vibration. Laughing Stock/Corbis hide caption

itoggle caption Laughing Stock/Corbis

Depression and chronic pain are associated with dry-eye syndrome, a British study finds. And it's more likely as you age. Boris Lyubner/Illustration Works/Corbis hide caption

itoggle caption Boris Lyubner/Illustration Works/Corbis

Morphine and oxycodone (the active ingredient in Oxycontin) are strong narcotic pain relievers on their own. Moxduo, a drug now up for FDA approval, would combine morphine and oxycodone in a single capsule. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

A brain that can let other thoughts bubble up despite being in pain might help its owner benefit from meditation or other cognitive therapies. iStockphoto.com hide caption

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Hydrocodone, sold as Vicodin and other brand names, may face tighter restrictions on prescribing and use. Toby Talbot/AP hide caption

itoggle caption Toby Talbot/AP
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An FDA advisory panel voted to increase controls on painkillers containing hydrocodone, such as this generic version of Vicodin. Sue Ogrocki/Associated Press hide caption

itoggle caption Sue Ogrocki/Associated Press

Nurse Corean McClinton, left, talks about pain management with Sherry Webb at the Sickle Cell Disease Center in the Truman Medical Center, in Kansas City, Mo., in 2007. Dick Whipple/Associated Press hide caption

itoggle caption Dick Whipple/Associated Press

Carolyn Tuft and her daughter Kirsten (seen here in 2005) were the victims of a shooting at a Salt Lake City mall in 2007. Kirsten was one of five bystanders killed, and Carolyn was left in severe pain. Courtesy of Carolyn Tuft hide caption

itoggle caption Courtesy of Carolyn Tuft

Boiling is the easiest way to dispatch a crustacean, but there are some signs that the creatures can feel pain. iStockphoto.com hide caption

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Does a little sugar water before shots really help ease a babies' pain? If only they could tell us. Dmitry Naumov/iStockphoto.com hide caption

itoggle caption Dmitry Naumov/iStockphoto.com

I could use some shushing and swaddling right about now. iStockphoto.com hide caption

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At Universal Pain Management, Dr. Francis Riegler confers with Trudy Roberts, the clinic's nurse practitioner, over a patient's record of prescription drug purchases. Sarah Varney/KQED hide caption

itoggle caption Sarah Varney/KQED
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