1. There is an adaptation period for changing skin care products. When changing skin care products, there is usually an adaptation period of one to two weeks. If the skin is in good condition, it is not classified as sensitive skin. It usually adapts within a week. Before changing skin care products, you must first perform an allergy test on the replaced skin care products to ensure that the skin will not be allergic to the skin care products before they can act on the face.
2. The skin is the foremost organ that senses changes in the outside world. When changing skin care products, the skin will respond quickly, so you can observe the performance of the skin to determine whether it is suitable for use.
3. When using a new skin care product, the ingredients and nutrients it contains are a new environment for the skin. Because the skin has adapted to the original skin care product, it will take some time to adapt to the "new environment" after replacing the skin care product.
4. When some skins change skin care products, there will be a variety of symptoms, such as: redness, allergies, acne, etc. Especially for allergic skin, it is more obvious to change skin care products.