Aromatherapy is the art of application of essential oils to help promote natural healing and well 
being. A word of caution: the term “Aromatherapy” is so widely misused by different individuals and companies that promote “proprietary blends” of fragrant oils for recreational usage.
One must be very careful. Real Aromatherapy has nothing to do with the candles and vaporizers that supposed to make you smart or happy.
Fragrance Oil - synthetic product that mimics the smell of essential oil and has nothing to do with essential oil’s healing properties. IMPORTANT: Fragrance oils must never be used in aromatherapy. It can cause the poisoning. Use only reputable sources of essential oils, so you know that essential oil was not substituted with fragrance oil.
Essential Oil – is not actually oil but an essence of plants and flowers. Essential oil is a complex natural combination of hydrocarbons, alcohols, phenols, methyl ethers, aldehydes, ketones, organic acids and esters, oxides, lactones, and coumarins. One essential oil can contain just a few or hundreds of components.
Many modern drugs were made to mimic healing properties of essential oils or herb teas that were used by doctors for centuries.
Aromatherapy is used in by doctors and in hospitals in many European countries ( France, United Kingdom, Germany, Ireland, and Switzerland). Financial data from European countries shows that the usage of complimentary medicine greatly reduces the cost of health care and improves general health of local population.