Aromatherapy is the treatment or prevention of disease by the use of natural oils extracted from flowers, bark, stems, leaves, roots, or other parts of a plant. The volatile plant oils, including essential oils, are used for psychological and physical well-being. They promote relaxation and help to relieve stress. Aromatherapy is beneficial in a wide range of physical and mental conditions including burns, infections, depression, insomnia, and high blood pressure.