A system for treating pain consisting of an "add-on" module integrated within the implantable pulse generator (IPG) component of IPG spinal cord stimulators, or, alternatively, integrated within the radiofrequency (RF) transmitter component of RF spinal cord stimulators. The system automatically and continuously monitors, measures, and classifies multiple patient physiological parameters without human intervention. The system also classifies qualitative perceptive changes felt by the patient. On the basis of this input vector information, the system automatically and continuously generates the most appropriate stimulation programs to improve, alleviate, or eliminate the patient's pain without human intervention. The system automatically and continuously adapts itself to both quantitative physiological changes within the patient and qualitative perceptive changes felt by the patient.