Patch tests are an easy way to help predict if you will have a negative initial reaction to a new product. It is recommended to perform a patch test before incorporating a new product into your routine.
The following are easy steps on how to do your own patch test:
Use the inside of your wrist as a starting point. It's thinner than the rest of your body skin. The side of the neck is another good option to check for compatibility.
Apply a small amount of the product to one of these areas.
Cover the area with a bandage.
If a reaction, such as slight pink appears but subsides within 10-15 minutes, don't worry about it. If after 24 hours, you don't see any reaction, then you're fine with the product.