Most essential oils contain dangerous, even toxic chemicals that can cause burning of the skin, convulsions, poisoning, and other undesirable effects. Used in a diffuser or simply opening a bottle of your favorite essential oil is the safest route. The use of essential oils in any other mode should be done under the supervision of an expert. Undiluted essential oils should never be used for any other purpose than to perfume your environment. Precautions Essential oils are concentrated liquids distilled from plants that contain many natural chemicals.
Some oils are toxic or can induce undesirable neurological effects.
So, it is very important to seek advise when using unfamiliar essential oils. For example, lavender is a safe essential oil unless you are allergic to lavender flowers. Do not use essential oils other than for their aroma without the advise or supervision of an expert, or the prescribed therapy from a health professional. Never apply undiluted essential oils directly to your skin. Do not mix undiluted essential oils in bath water, use diluted versions such as massage oils for this purpose.