You may be asking, how does aromatherapy work? Once the aroma enters the nasal cavity, changes occur in the limbic system, a complex biological switchboard in the brain which controls things like memories and emotions. Some ways to use essential oils are, putting a drop or two on the hands (if direct contact with the oil is safe) and inhaling directly, there are also some high quality essential oil diffusers on the market, look for one that does not alter the chemistry of the oils. Some oils can be taken internally, and users have had some incredible health results with that. Do not take oils internally unless the label says it is safe to do so. Many people mix essential oils in ,what is called , a "carrier" oil like almond oil, vitamin e oil, or jojoba oil. You can then massage the oil blend into the skin, and will receive the benefits, as soon as, your body absorbs them ( about 20 minutes). One essential oil blend ,that I use during sports massage, is great for trigger point therapy. I use 4 oz vitamin e oil, and add 10 to 15 drops of lavender, lemongrass, peppermint, and sage. This blend has a high linalool content which , to make a long scientific story short, has been proven to effective in treating myofascial pain!