Patch testing

Try every new product on a small patch of skin before using it on your face.

1. Apply a small amount behind the ear or on the inside of the elbow.
2. Leave it for 48 hours without washing the area.
3. If you notice redness or itching, rinse it off and do not use the product.

Introduce one new product at a time, a week apart, so you know which one does what.