Microcrystalline scar removal and skin rejuvenation is one of the most advanced cosmetic methods in the world, which can partially replace drug erosion, grinding, surgery and other scar removal methods, and can form a more complete series of scar removal methods with it. It is widely used in Europe, America, Japan, Korea, Hong Kong, Taiwan and other countries and regions, and has gradually become one of the necessary items in the cosmetic surgery department. The principle of microcrystalline scar removal is to use tiny aluminum trioxide polycrystals (referred to as microcrystals) to be guided by a vacuum-tight system inside the machine, through the finger-sized abrasive head with small holes, on the one hand, the microcrystals are sprayed out through the positive pressure outlet to hit the uneven skin scar surface at high speed to achieve the effect of smoothing the skin, and on the other hand, the mixture of tissue debris and microcrystals under the abrasive head is sucked away through the negative pressure suction port. Because of the fine particles, the action force is evenly distributed on the skin surface, therefore, epidermal grinding can be performed precisely. According to the reports of domestic and foreign medical experts, microdermabrasion is most suitable for the following conditions: 1. acne and post chicken pox scarring. 2. 2.Fine wrinkles on the skin. 3. Hyperpigmentation of the skin. 4.Dermatitis with rosacea. 5.Aesthetic skin scars. 6, Skin scar after tattoo. 7.Burn or post-trauma scar. 8.Age spots and oily skin, etc. 9.Big pores. Microdermabrasion scar without anesthesia, only mild discomfort, but no significant pain, if to achieve the best results may need to repeat p multiple times to receive treatment. Certain superficial lesions such as brown age spots, dull skin aging and enlarged pores can be seen after several treatments. Fine wrinkles, sun damage and other skin problems require more frequent treatments. Typically 5-6 treatments of 15-30 minutes each are needed, and generally 4-8 treatments will give a good result. Scar grinding requires more times, depending on the severity of the scarring usually about 10-20 times to achieve good results. In conclusion, the treatment results and the number of procedures vary depending on the depth of the lesion. The interval between two grinding sessions can be long or short depending on individual skin conditions, with most of them taking about 2 weeks. Microdermabrasion is not like fruit acid peeling which only works on the superficial epidermis and makes peeling difficult, nor is it like traditional grinding which tends to damage the deeper layers of the skin and form new scars, pigmentation and other conditions. Moreover, after microdermabrasion, epithelial cells will be regenerated rapidly to renew the aging tissues; at the same time, because microdermabrasion stimulates oxygen absorption and blood circulation in the skin growth layer, it accelerates tissue development and promotes the production of collagen and elastic fibers, making the skin delicate, soft, fresh and natural, elastic and lustrous, and energetic, so it can also be effectively used for daily skin beauty care. The advantage of this microdermabrasion procedure is that the skin grinding procedure is gentle and subtle, and the grinding depth is based on the slight redness of the area. The scab will fall off on its own after 6-8 days and will not affect work and life too much. Since the skin is delicate after microdermabrasion treatment, you need to take good care of hydration, avoid using too stimulating fruit acid products, and pay attention to sun protection, such as wearing a sun hat, sunglasses and sunscreen. Microdermabrasion generally has no special side effects except for temporary pigmentation.