Photorejuvenation is a type of skin treatment that uses specific wavelengths of colored light to directly penetrate the skin to the deeper layers of the skin to remove spots, whiten, improve acne, and remove wrinkles. The whole process of photorejuvenation can be divided into three steps: preoperative preparation, intraoperative operation and postoperative care: 1. The patient will feel a local warm sensation after the instrument starts to operate; 3. Post-operative care: after the treatment, the patient will wash off the cold gel with water and use ice towels or ice cubes to apply cold compresses to the treatment area. The skin rejuvenation is a common clinical beauty technology, but there are certain contraindications to this technology, such as pregnant women and scarred bodies should avoid the operation, patients should first go to the hospital to understand the relevant precautions before the treatment, under the advice of the doctor, so as to avoid accidents in the treatment process.