Do not take any oils internally without consultation from a qualified aromatherapy practitioner.  Do not apply undiluted essential oils absolutes, CO2s or other concentrated essences onto the skin.  If you are pregnant, epileptic, have liver damage, have cancer, or have any other medical problem, use oils only under the proper guidance of a qualified aromatherapy practitioner.  Use extreme caution when using oils with children and give children only the gentlest oils at extremely low doses.  A skin patch test should be conducted prior to using an oil that you've never used before.