Freckles are an autosomal dominant pigmentation disorder, mostly seen in young and middle-aged women, mainly on cheeks, cheeks, nose, forehead and chin, and occasionally on the back of the neck and hands, and appear as isolated, non-fused spots of light brown or brownish color. It is symmetrical or different on both sides, mostly appearing around 6 years old, often increasing with age. Its development is related to sun exposure and often occurs in exposed areas. Patients may feel that their freckles are more obvious in summer and fade in winter. In addition, freckles are also related to estrogen secretion in the body. When menstruation comes, the color of freckles tends to intensify, and after menstruation, it turns lighter. The most ideal treatment method for freckles is Q-switched laser treatment, especially at 532nm wavelength, which does not touch the skin and does not damage the skin, and removes the pigment directly, leaving no trace after treatment. Most of the freckles are removed in one treatment, and very few of them need two treatments. After the treatment, the scabs usually fall off in 5-7 days, and the pigmentation disappears in 4-6 months, and the skin regains its whiteness, with definite and safe effects. In addition, color light can also treat freckles, and the treatment principle is the same as laser. After the treatment, you can wash your face and put on makeup, and the effect on normal work is small. However, color light is a miscellaneous wave, not a real laser, which has the effect of removing redness, blackness, whitening and rejuvenating skin and wrinkle removal. The treatment is to treat the skin lesion and the surrounding normal skin together, playing a color difference, each treatment freckle lighten some, generally need 1-3 times treatment, but the best effect of the first treatment, with the freckle color lighten the efficacy decreases, the treatment effect is weaker than laser, but has the effect of skin beauty. Patients with dark skin and freckles on upper lids are not suitable for color light treatment. The application of carbon dioxide laser or liquid nitrogen freezing can also treat freckles, but with less safety. Patients with freckles should pay attention to prevent direct sunlight on the face after treatment, and wear a sun hat or umbrella when going out, or apply sunscreen on the exposed parts to avoid the recurrence of freckles. Secondly, eat more fresh fruits and vegetables rich in vitamin C and vitamin E in daily life, avoid taking photosensitive drugs and foods such as: psoralen, celery, white radish, cilantro, etc.; keep your mood relaxed and happy, avoid mental state of worry and depression, do not use drugs casually, and use spot removal products under the guidance of doctor for reasonable application.