Aromatherapy is a therapy in which the scent of essential oils from flowers, herbs, and trees is inhaled to promote health and well-being. 

Aromatherapy practitioners come from a wide range of career fields and there is no set credential or standard. Many complementary health professionals use aromatherapy in conjunction with other modalities such as acupuncture or massage therapy. Basic courses at aromatherapy schools vary in length from 30 hours to 100 hours. To practice at the professional level, organizations such as the National Association for Holistic Aromatherapy (NAHA) suggest 200 hours or more of training.