Aroma diffusers use aroma to enhance a feeling of well-being. It works as inhalants in an effort to affect mood and promote health. Essential oils that are inhaled into the lungs offer both psychological and physical benefits. Not only does the aroma of the natural essential oil stimulate the brain to trigger a reaction, but when inhaled into the lungs, the natural constituents (naturally occurring chemicals) can supply therapeutic benefit. Aroma diffuser can Diffusing eucalyptus essential oil to help ease congestion is a prominent example.