Aromatherapy oil. Hand creating an aromatherapy oil by dropping an essential oil into a bottle of carrier oil. The essential oil is made from fragrant flower and herb extracts. Aromatherapy oils release their volatile plant extracts into the air as they are warmed or massaged into the skin. Aromatherapists claim that they can treat a range of disorders, particularly psychosomatic and stress-related conditions. However, aromatherapy is mainly used by people to create a sense of general well- being.