Aromatherapy is a holistic healing treatment that uses natural plant extracts to promote health and well-being. Essential oils are used during aromatherapy, which are distilled from plants, flowers, bark, roots, or other parts of a plant. These oils are thought to have therapeutic properties when inhaled or applied to the skin. Aromatherapy is often used as an alternative or complementary therapy for a variety of conditions such as stress, anxiety, depression and insomnia.