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. Apart from providing a pleasant smell, aromatherapy oils can provide respiratory disinfection, decongestant, and psychological benefits. Inhaling essential oils stimulates the olfactory system, the part of the brain connected to smell, including the nose and the brain.