Microneedle cosmetology utilizes many tiny needles on the microneedle roller to stimulate the skin, which can make more than 200,000 microscopic tubes in a very short period of time, so that the active ingredients can effectively penetrate into the skin, with special products for wrinkles, whitening, repairing and removing scars to achieve the ideal effect of reducing wrinkles, treating scars and stretch marks, and whitening the skin. However, the safety of microneedle is still controversial, its shortcomings and surgical risks are as follows: 1, equipment is expensive, and each treatment needs to be replaced with a new microneedle, the cost is high; 2, there is pain in the treatment, it must be numbed to stop the pain, anesthesia ointment applied externally for 30-60 minutes prior to the treatment; 3, the depth of the microneedle is not well grasped or not sterilized in place, which will result in redness and swelling of the skin, blisters, inflammation, and infection. If there is redness, swelling and pain, it usually takes 1-3 days to subside, and epidermal damage takes 3-5 days to repair; 4, the care of the skin after micro-needling is crucial, if the care is not appropriate, it will produce more serious sequelae, including causing pigmentation, the formation of new pigmented spots or erythema; 5, the use of micro-needling treatment of the skincare products, the safety of whether there is a guarantee is also crucial, if the cosmetics do not have a strict testing standards and production standards, the safety risk will be increased by several times, and in severe cases, scars may be left behind; 6, the spread of infectious diseases, such as hepatitis, syphilis, AIDS, etc..