Micro-needling is the use of roller micro-needle or electric micro-needle in the skin to cause small wounds, and then introduced into the treatment drugs to promote skin proliferation, to achieve the effect of lightening acne marks, skin repair. Microneedle treatment steps are generally: facial cleansing, anesthetic, disinfection and cleaning, after the treatment area coated with hyaluronic acid and other drugs, with roller microneedle or electric microneedle in the skin to form a microscopic holes, to help the drug absorption, and at the same time to stimulate the skin to stimulate the proliferation of collagen to repair the skin purpose, after the treatment of the recommended ice mask. At present, it is mainly used for facial anti-aging, fade scars, improve wrinkles and so on. Microneedle treatment also need to pay attention to skin hydration, sunscreen, avoid spicy and stimulating food, make-up, alcohol, etc. during the recovery period. Although micro-needling is a less traumatic medical project, but it is still invasive operation, there is a risk of infection, it is recommended to choose a formal plastic surgery hospital for treatment, and pay attention to scientific care after treatment.