Oils have always played a vital role in human life. Most alternative treatments like Ayurveda, Siddha, Native american medicine and Chinese traditional medicines use essential oils extensively. These oils come from different sources, are highly concentrated and are used extensively in skin treatments, perfumes and disinfectants. if you have taken any of these treatments, you probably have used some oils also that came with them. oils are used in Aromatherapy as well. From all these wide uses of oil in medicine, they are definitely essential oils.