Microneedling uses a micro-needle roller to stimulate the skin, making a large number of microscopic tubes in a short period of time, so that the active ingredients are localized, layered, quantitatively and effectively penetrated into the skin, while also stimulating the proliferation of collagen and fibroblasts in the dermis. This minimally invasive not only heals quickly, but also leaves no scars. When carrying out micro-needling, the depth is not well mastered or disinfection is not in place, which may lead to many adverse reactions, as follows: 1, pain: the direct side effect caused by unregulated micro-needling is pain, because itself is the use of micro-needles to punch holes in the skin, but this pain is tolerable to the lovers; 2, slight bleeding: micro-needling will damage the skin, and will be due to these damages and slight bleeding of the Side effects. However, lovers do not have to worry too much, because the body’s blood clotting mechanism will repair the wound by itself, so that the micro-needle caused by the wound no longer bleed; 3, wound scabs: micro-needle cosmetic surgery after the skin is more fragile lovers will appear scab phenomenon, is a normal process of skin repair wounds, but not every lover of the human body will appear; 4, facial erythema: the main micro-needle operation related to bad, if the micro-needle in the The same part of the face stays too long, it may lead to deepening of the skin injury, and even erythema; 5, infection: mainly for the local aseptic operation is lax, resulting in local bacterial reproduction or external bacterial introduction; 6, infectious disease transmission: mainly for the sterilization is lax, resulting in, for example, hepatitis, syphilis, AIDS and so on.