Hello! Photorejuvenation needs to be done five times to be effective. Then do it once a year and a half. Nursing in the middle is very troublesome. Not being able to bask in the sun for half a year is also very harmful to the stratum corneum. If the process is not good, the pigment will precipitate, which is equivalent to disfigurement. I don't even recommend you to do this photon rejuvenation, because there is a big plastic surgery hospital downstairs in my company, and there are often claims for damages caused by this project.