Aromatherapy has been practiced in France and England as an integral part of treatment for a number of conditions. It has become popular in Western cultures in the past few years, and the practice is receiving attention as an important part of alternative medicine. Many of these oils can be purchased at pharmacies or health food stores. Oils come in concentrated forms and should be diluted. Oils applied full strength to the skin, such as clove, can cause rashes and irritation.
(Source: Under Pressure: Fast and easy relief from the pressures of modern life with the ancient science of pressure point therapy. By John Sherman, M.D., OTR, CST.)