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Essential oils may
be harmful if taken by mouth and should not be swallowed.
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Essential oils can
result in skin rash or irritation, and they should be diluted with
carrier oil before use.
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Allergy may happen
due to contamination or by the elements of the herbs from which the
oil is obtained.
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Some oils are
thought to have dangerous effects on the brain, liver and kidney and
can raise the chances of getting cancer with long-term use.
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Sage, rosemary and
juniper oils may lead to the contraction of the uterus when taken in
large doses, and it is forbidden during pregnancy due to the high
chance of getting spontaneous abortion.
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Infants and young
children less than 5 years may be very sensitive to the effects and
side effects of essential oils.
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Essential oils are
not allowed in asthma, heart conditions, hypertension, cancer,
epilepsy, and frequent allergic reactions.
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The smell of the
oil may cause nausea, vomiting or negative emotions to very ill
patients and patients undergoing chemotherapy.