Why do we have pain?

Although doctors don't quite understand the mechanism of pain, they do know that it is a protective thing. By feeling pain, you will protect yourself from what is causing it, whether it be a hot stove, stepping on glass, or getting blisters on your feet.

Pain is unpleasant and, if you have chronic pain, you may want to do just about anything to get over it. But if you don't feel pain, you can end up with some very severe injuries or illnesses.

Reference: 

John David Clark, MD, PhD. The Pitfalls of Profoundly Effective Analgesic Therapies. In Clinical Journal of Pain. November/December 2008. Vol. 24. no. 9. Pp. 825-831.

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