Spots are the increase of melanocytes or melanin particles. The principle of laser spot removal is that the laser crushes the melanin particles into fine particles, which are later metabolized gradually by the skin or engulfed by the macrophages in the dermis. Whether the rebound of laser blemish removal will occur or not is related to the type of blemish. Nevus of Ota and brownish nevus of cheek area usually do not rebound after laser treatment, while coffee spots and freckles may rebound. Melasma is a metabolic skin problem related to many factors such as metabolism and female endocrine. It can be treated by laser treatment, oral medication and daily skin care to reduce the effect of melasma, but it also has the problem of rebound. Therefore, after laser spot removal, candidates need to strictly protect themselves from the sun, pay attention to skin moisturizing care, keep a happy mood, take some oral medications to reduce pigmentation, avoid spicy and stimulating diet, and drink more water. If pigmentation appears again, laser spot removal treatment can be performed again and still be effective.