Laser cosmetology is a non-surgical cosmetic method that has emerged in recent years. By irradiating the skin with the right amount of laser light, doctors can make the skin fine and smooth in a short time. However, because of the lack of understanding and even misunderstanding of laser cosmetology, many people stop to become beautiful. Will laser cosmetic surgery make the skin thinner? No. Many people think that laser beauty will damage the skin, the skin surface is destroyed, just like the wall skin is chiseled off, getting thinner and thinner. In fact, after 25 years old, our skin gradually thins as we age and lose collagen and elastin. And laser lightens pigmentation, removes small dilated blood vessels, repairs photo-damaged skin and improves the appearance of the skin through selective photothermal action. At the same time, the photothermal action of laser can activate skin fibroblasts, increase the expression of collagen, produce molecular structure changes in dermal collagen fibers and elastic fibers, increase the number, rearrange, and restore the elasticity of skin, thus achieving the effect of reducing wrinkles and pores. Therefore, instead of thinning the skin, laser cosmetic treatment will increase the thickness of the skin and make it tighter and more elastic, transforming it towards youthfulness. Will laser aesthetic make the skin sensitive? No. Many people believe that laser cosmetic skin thinning, skin without the protection of the “old skin”, the skin will become sensitive, heat and wind intolerant, sensitive to cosmetics. Although it is true that for a short period of time, laser aesthetics can reduce the moisture of the epidermis or damage the stratum corneum, and that scabs can form with exfoliating laser treatments. However, all the “damage” is under control and will heal. The newly healed skin has a complete structure (including the stratum corneum, which will be replaced by the old and the new even without treatment) and the function of the old and the new, so the scientific laser cosmetic treatment will not make the skin sensitive. Does laser cosmetic treatment create dependence? No. Many people believe that laser cosmetic treatment is possible, but once it is done, it becomes dependent, and if it is not done, it will rebound or worsen. Those who hold this view do not understand the law of aging and the science of beauty. The aging of human skin is continuous and does not end with anything, so all we do is to slow down the aging process a little. Laser cosmetic treatment is like cleaning a dirty room, it will be better with a little treatment, after a while it will still be dirty and still needs to be cleaned. This is not because we have become dependent or addicted to lasers, but rather because the wheel of age is spinning. Will one (session) of laser cosmetic treatment solve my problem completely? No. There are two answers to this question: how many treatments and whether the treatment can be maintained permanently. The human body is complex, each person’s response to a certain stimulus and its degree is different, the same problem, some people three times to get very good results, while some people seven or eight times may not get good results. It is like the amount of alcohol some people drink a couple of white wine to get drunk, and some people drink a pound without falling down. For example, freckles are a hereditary disease, which can only be maintained for a period of time after treatment, and there is always a certain degree of recurrence afterwards. That is to say, the idea that it is all in one go is not scientific. I need to protect myself from the sun after the laser treatment, can I skip the treatment? No, you can’t. There are clear requirements for sun protection after laser cosmetic treatment, generally 3 months after treatment to pay attention to sun protection to avoid pigmentation. However, it is important to note that sun protection is not something that should be taken care of only after laser cosmetic treatment. Studies have shown that the ultraviolet rays of the sun are the main culprits of skin photoaging (pigmentation, erythema, fine wrinkles). From the perspective of preventing photodamage and protecting the skin, it is important to pay attention to sun protection at all times and choose different sunscreens according to different environments.