There is no good or bad in the two methods of spot removal laser and picosecond, only the applicable population and working principle are different. 1. Laser spot removal: common clinical spot removal lasers are photorejuvenation, C6, etc. The fixed wavelength laser acts on the melanin in the skin to promote its decomposition and absorption, so as to be discharged out of the body and achieve the effect of removing spots. Generally, it needs to be repeated for about 3~4 times, and patient satisfaction is high. It is mainly used for facial freckles, sun spots, age spots and such epidermal spots. 2. Picosecond spot removal: it belongs to the emerging laser treatment technology, utilizing the output of short pulse, using the effect of photo-mechanical shock wave to replace the thermal effect, crushing the target into small particles, and subsequently achieving the effect of improving pigmentation and whitening and skin tightening. Compared with ordinary laser, the pulse width of picosecond is narrower, the light energy is more concentrated, and the energy can be better gathered on the target, which can remove melanin better and selectively. Picosecond laser has less side effects, and is suitable for all people with spots, but the cost is higher. To summarize, generally when the ordinary laser spot treatment reaches the peak of bottleneck period and the treatment effect of the residual skin problems is not good, then choose picosecond laser treatment, then you can achieve better results. The above two methods need to be chosen under the assessment of a professional doctor, and the wrong choice is not conducive to spot removal.