Laser spot removal is to selectively irradiate the local skin tissue with pigmentation by choosing a specific light source, which is absorbed by the pigment particles in the pigmentation in a very short period of time, causing the pigment particles to increase in temperature, expand and vaporize rapidly, and eventually will be phagocytosed and cleared by macrophages in the human body, so as to achieve the effect of removing the pigmentation. Its advantages include scarless, safe, no damage to the surrounding normal tissues, and little side effects, which will not cause allergy or capillary tissue lesions. At the same time, the recovery time is short and the number of treatments is small, which is especially effective for removing melanin on the surface of the skin and rejuvenating the skin. However, laser blemish removal also has its disadvantages. If the procedure is not done properly, it is easy to cause burns on the skin, and redness, blisters, and even retinal injury due to improper operation, which can lead to blindness in serious cases. Secondly, laser spot removal only targets the visible spots on the surface of the skin, but not the invisible subcutaneous melanin. In addition, people who are allergic to light sources, people who suffer from diabetes, high blood pressure, mental illness, and people who are pregnant or have inflammation on the face or chloasma caused by gynecological diseases are not suitable for laser blemish removal.