Spot spotting is effective, spotting is to take physical methods, such as freezing and laser, to make local pigment cells necrosis or absorption, so as to achieve the effect of spot removal. Frozen spot spotting is done with cotton swabs dipped in liquid nitrogen, which requires a visit to the dermatology department and is cheap, convenient and effective. In addition, the advantage of laser spot removal is one-time removal, carbon dioxide laser is more commonly used, high thermal energy can accurately knock off the spots, and generally does not leave scar; you can also use more advanced laser, such as emerald Q laser, which can selectively destroy pigment, laser spot removal time is very short, generally half an hour, and does not affect normal life and work after treatment. After laser blemish removal, the diet should be light, eat more nutritious food and less dark food to ensure the supply of nutrients to the body. At the same time, pay attention to local cleanliness and hygiene, do not use skin care products at will, and pay attention to sun protection.