Does laser treatment cause skin sensitivity? General laser treatment has high selectivity, can accurately treat lesions without harming the skin, and has little or only a very slight effect on normal skin, so it will not cause skin sensitivity. The exfoliative fractional laser may cause temporary skin sensitivity due to partial exfoliation of the epidermis (the incidence is about 10%), but it can be repaired soon. However, laser treatment should not be performed frequently because the probability of skin sensitivity caused by laser is very low, because it is true that the skin function of some patients will be affected to a certain extent. How often should it be done? First of all, our skin has a normal metabolism time, which is generally about 28 days, which is actually the replacement time of the epidermis. It is recommended that if laser treatment is used, the interval should not be shorter than one month. In fact, the interval between many laser treatments is one month, some exfoliative laser treatments such as acne depressed scars have an interval of up to three months, and some diseases such as Ota’s nevus treatment have an interval of up to 3 to 6 months. The treatment of chloasma with large light spot and low energy can shorten the treatment interval, but because of the low energy used, skin sensitivity will generally not occur. Sensitive skin can be treated with laser: A large number of clinical studies have proved that low-energy photons or lasers can effectively treat facial flushing and telangiectasia of sensitive skin. And because the energy of the treatment is very low, it will not cause special discomfort during the treatment process, which is a very gentle method. The treatment principle is attributed to the effect of light modulation: light regulates the immune function of the skin, which can reduce the sensitivity of the skin and enhance the barrier function of the skin.