Chronic pain is a condition in the nervous system where a light switch seemingly got turned on and never got turned off. Patients initially experience pain because of some type of injury that has occurred (i.e. a noxious stimuli). This is nature’s way of helping us protect ourselves from further injury. The pain typically stops once the noxious stimuli has discontinued and enough time has passed for the injury to heal itself. Chronic pain occurs when patients continue to experience pain even though the noxious stimuli has stopped and the injury has healed with time. Read more.