There are very few side effects and it is very safe, which is a very big advantage of photorejuvenation treatments. However, as with any treatment, there are two sides to the treatment itself. Photorejuvenation is on the one hand a very good treatment for pigmented skin conditions, but it also has the potential risk of causing pigmented changes to the skin. In addition, the human body is very different, and a small number of people may develop hyperpigmented spots, and a very small number of people may develop acne-like rashes and blisters. So the treatment should be done in a proper hospital and no abuse is allowed. The practice of describing photorejuvenation as absolutely safe, infinitely exaggerating its efficacy, or even performing the treatment in a beauty salon is irresponsible and should be corrected. No special skin care is required after treatment, but it is recommended to use skin care products under the guidance of a doctor, including stopping the use of all functional cosmetics (including various spot removal creams, wrinkle removal creams, etc.), prohibiting the use of various chemical peeling treatments (also known as peeling treatments), prohibiting skin grinding and the use of scrub cleansers, etc. Since the cause of pigmentation spots and all kinds of photoaging is sun exposure, sun protection and the use of sunscreen are important. Of course the application of skin moisturizers is also necessary.