Ultra-picosecond spot removal has no effect when done once, and the whole course of treatment after ultra-picosecond spot removal can be maintained for 1~2 years. Ultra-picosecond spot removal makes use of picosecond level laser to make facial skin tissues react under high energy concentration to achieve the effect of removing spots, which can be used to remove coffee spots, freckles, brownish green spots, age spots and other pigmented spots. Ultra picosecond spot removal needs to be done for a whole course of treatment to have good effect, a course of treatment is 3-6 times, only one ultra picosecond spot removal, can not see any effect. After the whole course of hyperpigmentation, its effect can be maintained for 1~2 years, and the specific effect maintenance time is related to the operation level, individual physique, postoperative care and other factors. If the effect of hyperpigmentation disappears, the candidate can have the treatment again. Before considering hyperpigmentation, candidates can go to regular professional hospitals to consult doctors for details.