Freckles are light brown or dark brown spots of varying sizes, commonly found on the face, shoulders, neck, back of hands and other exposed parts of the body, mostly caused by genetic factors and autosomal dominant. Frequent sun exposure can promote and aggravate this disease. Laser can remove pigment mainly through the principle of selective photothermal effect. Whether it is hereditary freckle or freckle formed after birth, it can achieve better treatment effect, but usually it cannot be cured at root. If candidates do not pay attention to life care after laser treatment, the problem of recurrence is likely to occur. Therefore, when using laser to get rid of freckles, it is recommended that candidates receive a complete course of treatment, about 1 time/month, 3-5 times for a course of treatment, and regular follow-up every year, the effect of treatment is more consolidated, which can maximize the prevention and solution of skin discoloration recurrence problem. In order to prevent the recurrence of freckles, the daily skin maintenance of the candidates should pay attention to the following points: 1, because sunlight can aggravate freckles, it should be strictly prevented from sunlight, and sunscreen can be used to avoid sunlight stimulation; 2, eat less photosensitive food, such as carrots, leeks, celery, parsley; 3, don’t indiscriminately use the spot creams, which contain hormones, lead, mercury and other substances, which can jeopardize the health of the skin; 4, follow the doctor’s prescription to use hydroquinone cream or 3% hydrogen peroxide solution, which has the effect of preventing and solving the problem of skin pigmentation recurrence to the greatest extent. Hydroquinone cream or 3% hydrogen peroxide solution, which has the effect of decolorization.