Many patients, whose skin becomes sensitive and fragile after using ordinary cosmetics, buy purely plant-based cosmetics, or herbal cosmetics, instead of the chemical skin care products they used before. They think that plant-based cosmetics will not cause skin sensitivity and have a restorative effect on the skin. In fact, there is no real pure plant-based cosmetics in the current cosmetics market. If a cosmetic product is made up of pure plant extracts and is applied to the face, it can lead to uncomfortable facial skin. Surfactants, emulsifiers, etc., need to be added, that is, only with the addition of such substances can they be evenly applied to the face and increase the skin comfort of the external application. Even fragrances and preservatives, which often cause skin sensitivity, are present in order to make cosmetics taste better and keep longer. Some of the plants themselves, are irritating to the skin, and after ton time use, on cause skin redness, pimples, and after long time use, can lead to abnormal skin pigmentation. This is the plant that causes contact dermatitis on the face. Some of the plants added to cosmetics have a certain degree of photosensitivity, applied to the skin does not usually lead to skin allergy, but after contact with ultraviolet light, it can lead to skin photosensitivity, which we call photosensitive dermatitis. This reaction, which is more damaging to the skin, is also a skin reaction that is easily ignored by the user. Pure plant-based cosmetics are basically non-existent and can be irritating to sensitive dermatitis. Buying them, applying them to the area and trying them out is the main way to reduce skin irritation.