Essential oils can also be called volatile oils. This simply means that they are extremely aromatic in especially small quantities. The oil can come from flowers, herbs and other plant matter. They disperse easily into the atmosphere, and if you leave a bottle of essential oil uncapped, it will evaporate.
The most common method of extracting essential oil from a plant is through distillation.
This process uses steam to pull a small amount of volatile oil out of a plant. Oil can also be derived through expression, a “cold pressed” method through which no heat is used. Petroleum, methanol, ethanol, and ether can also be used to extract essential oil from a plant, and this process is known as solvent extraction.
Since a very small amount of these oils is highly potent, essential oil is usually diluted before inhaling or applying to your skin. Products known as essential oil diffusers come equipped with water tanks that require only the addition of a few essential oil drops to diffuse the surrounding air for several hours.
As mentioned above essential oils can be absorbed through your nostrils, or by directly applying them to your skin. Stress, headaches, depression, fatigue, asthma, dandruff, bronchitis, psoriasis, bad breath, gout and dozens of other conditions respond favorably when the correct essential oil is inhaled or applied. Essential oils have become accepted by traditional medical experts as acceptable ways to naturally treat a long list of conditions, both physical and mental.