Regardless of the type of the oils, a few general tips are advised for their usage. Scarpelli advises the users to look for signs of high-quality therapeutic grade oils: pure, medicinal and steam distilled. Most of the essential oils should never be applied directly on your skin. As mentioned earlier, the high concentration present in these oils may cause irritation or other unwanted reactions. Rather, the oils should be diluted with water or a carrier oil like almond or jojoba.
Apart from a few exceptions, never ingest essential oils. And in case it happens so, talk to your doctor especially if you notice any sudden changes in your well-being.
Here is a list of 10 of the most useful oils that you can assemble yourself and make a natural first-aid kit for common minor ailments.