I. What is fruit acid? Fruit acids are alpha hydroxy acids extracted from fruits (citric acid in citrus, malic acid in apple, glycolic acid extracted from sugar cane). It comes from natural origin and has the activity of organic acid. Second, the mechanism of action of fruit acids 1. strong antioxidant, promote the metabolism of the skin, so that the old skin rejuvenated. Therefore, fruit acids can be used in the treatment and routine maintenance of aging skin.2. Promote the outermost layer of aging stratum corneum to dissolve the keratin that accumulates at the mouth of the hair follicle, especially the keratin plugs. Therefore, fruit acids are suitable for the treatment and care of acne skin and improve acne and microcomedema skin.3. Fruit acids have strong whitening effects, so they can be used for the treatment of melasma, sun spots and hyperpigmentation.4. Promote the synthesis of collagen and hyaluronic acid. Fruit acid can significantly improve wrinkles and fine lines, even skin texture and reduce pores. Third, the clinical application of fruit acids 1. Indications for fruit acids: acne, chloasma, post-inflammatory hyperpigmentation, enlarged pores, periorbicular keratosis, ichthyosis, skin amyloidosis and other diseases are all indications for fruit acids. In particular, fruit acid treatment for acne is proposed here. Fruit acids are not suitable for all types of acne, and the most suitable type of acne is acne, especially closed acne. The next most suitable type of acne is pimples, especially closed pimples. The next most suitable type of acne is red marks and discoloration left behind by acne. The main function of fruit acids is to promote the shedding of keratin plugs, inhibit acne bacilli, and accelerate metabolism.2. Post-operative care of fruit acids: It is recommended to use complementary fruit acid skin care products, which not only enhance the therapeutic effect, but also continue to provide moisturization, promote metabolism, whitening, and accelerate keratin peeling. If conditions allow, it is recommended to use a mask for three consecutive days after fruit acid surgery to reduce the symptoms of irritation (sensitivity, dryness, redness).3. Interval of treatment: Every 2-4 weeks, 4-5 times as a course of treatment.4. Side effects of fruit acid: There will be slight stinging and redness after surgery, which will generally subside after cold compresses. The erythema reaction of a few people can last 1-2 days. Since fruit acids come from different fruits, some people may be allergic to fruit acids, although this percentage is very low. Any allergic reaction (itching, pain, discomfort, redness or even redness of the skin upon application) should be terminated as soon as it is detected. Apply a cold compress.