There is no risk, that is, using the instantaneous high heat generated by the laser spot to sweep the target within the scanning range, changing the focusing characteristics of the laser to form the laser spot, and using the pattern generator to complete the scanning. In the first few days after laser treatment, swelling and oozing blood will appear in the treatment area. When the swelling subsides, there will be scar skin. After a week or two, the scar skin will fall off and the wound will heal.