Picosecond laser treatment of freckles is also better than peeling, freezing and chemical peeling. The following three points are the advantages of laser treatment of freckles. 1. picosecond laser treatment of freckles has strong selectivity. Generally, there are many freckles, which exist in isolation and do not merge. Picosecond laser treatment of freckles is only aimed at the treatment of its parts, without affecting normal skin and leaving no scars. However, the traditional technical methods such as peeling, chemical peeling and liquid nitrogen freezing can not selectively remove the real pigment increase caused by freckles without damaging normal skin. 2. Picosecond laser treatment of freckles has few adverse reactions. Picosecond laser treatment of freckles is a more traditional treatment method. Its safety and reliability greatly reduce the adverse reactions in freckle treatment. 3. Picosecond laser treatment of freckles is simple. Picosecond laser treatment of freckles can generally achieve satisfactory results through 1-2 treatments. Compared with traditional methods to treat freckles, picosecond laser treatment has less influence on normal work and life. Picosecond laser is a commonly used method to treat freckles at present, and the treatment effect is ideal. Picosecond laser can effectively penetrate the surface layer of skin and reach the pigment group in dermal lesions. The commonly used technologies of picosecond laser freckle removal mainly include picosecond laser, Q-switched laser, photon, OPT and so on. When picosecond laser is used to treat freckles, the pigment of freckles is completely broken and disintegrated under the irradiation of strong laser, and then dissipated by itself, thus being cured. General 1 ~ 2 times can be completely removed, and the treatment interval is three months. After treatment, ultraviolet radiation is avoided, and spots on the face can be easily removed by picosecond laser. Why not?