Microneedles are used to stimulate the skin through micro needles, forming a large number of tiny tubes on the skin and introducing active ingredients with whitening and moisturizing effects into the skin tissues, using the stimulating effect of micro needles on the skin to stimulate the skin’s self-repair function to achieve the effect of lightening pigmentation and wrinkles, skin tightening and whitening. According to different needs, microneedles are mainly available in lengths of 0.25mm, 0.5mm, 1.0mm, 1.5mm, 2.25mm and other specifications. The main function of microneedling is to improve the skin condition, which can promote skin blood microcirculation, inhibit skin dullness, stimulate collagen regeneration, thus playing a whitening, tightening, anti-wrinkle effect. The use of anti-inflammatory drugs through microneedling can also relieve skin inflammation and can effectively treat skin problems such as acne skin and acne. For people with hair loss who have poor hair follicle activity, special microneedle patches can be applied to the hair follicles to improve the environment of the hair follicles and achieve the effect of inhibiting hair loss. In addition, there is a radio frequency microneedle is based on the percutaneous administration of microneedles, using partially insulated fine microneedles, the radio frequency energy is precisely applied to the skin, which can be applied to the skin tissue and sweat glands through the stable output of high frequency alternating current, so as to achieve the purpose of treatment, which can effectively treat severe acne, reduce scarring and treat the role of axillary odor. However, it is worth noting that micro-needle piercing of the skin will cause pain, bleeding, erythema, edema and other adverse reactions in the skin epidermis to a certain extent, and care measures such as strengthening facial hydration, anti-inflammation and anti-infection should be paid attention to after the injection.