What should I do for dull complexion, acne, blackheads, whiteheads and pimples on my face? Brush acid! Since some time, acid brushing has become a shortcut for skin beauty, and many people with the above skin problems choose to use acid brushing to solve them. I have asked many people who have brushed acid, and the most frequent responses are, “the effect is obvious”, “cost-effective”, “easy to use”. Are there any contraindications? The effect of acid brushing is indeed very good! Brushing acid can brighten skin tone, get rid of whiteheads, acne and other common skin problems, but brushing acid is not recommended for sensitive skin. The relationship between acid and keratin Whether it is salicylic acid, fruit acid, almond acid or whatever acid, the principle is similar, all use acid to exfoliate keratin, different acidity, the effect is different. When the skin is stripped of keratin, new keratin is exposed, and the skin will look especially tender, but if the frequent brushing of acid, skin metabolism can not keep up with the speed of acid brushing, the skin will lose the original protective barrier, can not resist ultraviolet rays, environmental pollution, may appear inflammation, redness, and even skin sagging aging and other phenomena. What are the commonly used acids? 1, salicylic acid: Salicylic acid is a natural anti-inflammatory products, cold medicine aspirin has a derivative of salicylic acid. In addition to anti-inflammatory, salicylic acid can also remove keratin, sterilization, anti-inflammatory, and thus is ideal for treating acne caused by clogged pores, the international mainstream acne products are containing salicylic acid, the concentration is usually 0.5 to 2%. Salicylic acid has good lipid solubility and can penetrate deep into the pores to clean aging keratinocytes (fruit acids cannot), but the use of the process may result in acne breakouts, redness and peeling. 2, A acid: A acid in the drugs appear a very high chance, such as: vitamin A acid, isotretinoin, a vitamin A acid, etc., they are the treatment of dermatological drugs, but the use of different. A acid can be treated to relieve local inflammation, reduce skin oil secretion, regulate skin epidermal growth changes, improve the pores around the keratin clogging condition, exfoliation effect. Isotretinoin is a derivative of vitamin A. For severe acne cases where general therapy is ineffective, including those where adequate amount, full course, and systematic application of antibiotics are ineffective, or for common acne with severe nodules or cysts, isotretinoin should be preferred, but the greatest side effect of A acid is teratogenic effect, so do not use it if you are preparing for pregnancy. 3, fruit acids: The use of fruit acids is very early, dating back to the 1970s, and because of their excellent skin resurfacing effects, they have now become a project of many medical aesthetic institutions. Fruit acids contain marzipan, citric acid, glycolic acid, etc. Very low concentration of fruit acids, only moisturizing effect. It is only at slightly higher concentrations that it has an exfoliating effect, breaking the link between cells in the stratum corneum and promoting the skin’s metabolism. At higher concentrations, it is more destructive and the effect reaches the dermal tissue, and can be used for chemical peels. Amygdaline is one of the fruit acids, but because it is special, it is listed separately. Amygdaline is the only lipophilic fruit acid available, and like fruit acids, it penetrates the skin easily. The other thing is that amygdalin has a large molecular weight, and compared to other fruit acids, it does not have the crusty wounds that are common after resurfacing, and still acts slowly on the skin (slow-release action similar to ibuprofen slow-release capsules), making it a more ideal resurfacing ingredient. The precautions for acid brushing Sensitive skin needs to be careful with acid brushing! As mentioned before, the principle of acid brushing is to stimulate skin renewal through slight exfoliation to achieve the effect of skin resurfacing, acid can damage the fragile skin barrier of sensitive skin, so sensitive skin acid brushing needs to be careful! Also, different concentrations of acid, the use of different methods, frequency, please consult the relevant customer service before using, after the brush acid remember to do a good job of sun protection.