Tens of millions of Americans suffer from chronic pain -- pain that lasts
longer than six months. Chronic pain can be mild or excruciating, episodic or
continuous, merely inconvenient or totally incapacitating.
With chronic pain, signals of pain remain active in the nervous system for
weeks, months, or even years. This can take both a physical and emotional toll
on a person.
The most common sources of pain stem from headaches, joint pain, pain from
injury, and backaches. Other kinds of chronic...