Aromatherapy is a holistic healing treatment that uses natural plant extracts to promote health and well-being. Sometimes it's called essential oil therapy. Aromatherapy uses aromatic essential oils medicinally to improve the health of the body, mind, and spirit. It enhances both physical and emotional health.Aromatherapy is normally used through inhalation or as a topical application. Inhalation: the oils evaporate into the air using a diffuser container, spray, or oil droplets, or breathed in, for example, in a steam bath. ... Massaging the area where the oil is to be applied can boost circulation and increase absorption.Essential oils are not safe to consume and can cause significant poisoning even if small amounts are ingested. ... The use of undiluted essential oils on sensitive skin or in the nostrils can irritate or burn. Susceptible people may also develop an allergic reaction and a skin rash.