While one of the benefits of a good foot massage is a general feeling of relaxation, reflexology is quite an exact science with larger goals than half an hour of physical well-being.

Reflexologists are schooled in applying pressure in precise locations to best aid clients. Specific areas of discomfort on the foot tell the Reflexologist a great deal about the health of the patient's internal organs.
Elfman, Johnson, "More Than a Foot Rub: The Ancient Art of Reflexology," Beijing Scene, Volume 5, Issue 16, July 9 - July 15

Clinical trials using the ART techniques in the treatment of various types of gynaecological pain showed conclusively that reflexology was far more effective than conventional medical treatment.
Ref: Whipps Cross Hospital Trial, London, 1992, McMillan, Porter