This will be a very short article, but I thought that this is one of the most import things you need to do before you use any new product.
I would strongly advise you to always do a patch test before using any product, this includes essential oils as all plants and other natural products contain active ingredients, that we, harvest and consume daily, to the great benefit of our diet and health. However, some plants like nettle, peanuts, citrus, etc. may cause, in some people, skin or even allergic reactions. So, if you are using any product for the first time on your skin, organic and natural extracts like essential oils, carrier oils, etc. are no exception.
I had reactions to my skincare products which I used for a very long time, and now I started to use more natural products. So, as you see this can happen even if you have used a product over time.
When you do your patch test:
Use a Clear Patch of Skin. The best place for me to do the patch test is in the crook of your elbow.
Wash and clean the patch of skin you're going to use first.
Apply a Small Amount to the Skin.
Wait 24 Hours. If you have no reactions you should be clear to use the product.
I would also like to advise that you always read and follow the cautions and restrictions of the products you wish to use.
With essential oils mix 1 drop of essential oil you wish to test, in a teaspoon of carrier oil. Apply a small amount of this mixed oil to the crook of your elbow, and leave uncovered for 48 hours. If no reaction occurs (stinging, redness), it should be safe for you to use the oil.
If all is well, you can do the patch test with the oil you prefer neat (without a carrier oil added) if required.
Before I used my oils, I was to excited and used most of my oils neat. I was lucky and had no reaction to it, but as you all know, we are all different and what works for me or have no negative reaction is not to say your body will act the same way. So rather be safe than sorry.