Do not ingest essential oil. They should only be used externally. Though there are many people who use essential oils by ingesting them or consuming it, this should only be done by consulting a doctor.
Avoid using essential oils while pregnant or nursing. Every essential oil serves a particular purpose, so it is advisable to consult your dermatologist especially for pregnant women. Cinnamon, clove, ginger, jasmine, sage, chamomile are some of the more common essential oils that should not be used by them.
Do not apply essential oils to mucous membranes. Never use essential oils near the eyes or put directly into ears. Some oils may damage your contact lenses, so don’t touch lenses immediately after using essential oils. These oils are potent and can cause irritation to your eyes.
In case you have sensitive skin and have a history of irritability, start by applying these oils discreetly. Make a small patch of skin and massage the oil into it. Wait for 24 hours to see if the area has any itchiness or irritation. This will help you safeguard your skin just in case the oil does not suit you.