The following principles need to be mastered for safe spot removal: 1) from superficial to deep, when you start to remove spots, you must remove superficial colors; 2) gradually remove spots step by step, for example, different lasers are used to remove spots, and lasers also have energy choices, so you can choose a slightly smaller energy at the beginning, and then gradually increase the amount or gradually encrypt the frequency; 3) always go to formal institutions, because formal institutions will sterilize and isolate, and before and after laser treatment, disinfection and care may be done more safely; 4) everyone has different reactions to laser treatment, including differences in pain tolerance. The treatment of laser treatment, sterilization, care and other aspects may do more at ease; 4, each person’s response to laser treatment is different, including differences in the degree of pain tolerance, so at first you can try, can accept and then continue to do. If it is not acceptable, discuss with the doctor whether there are other means to adapt, including the use of topical drugs or other means of treatment, do not rush, must be step by step, so as to be safer.