Laser blemish removal efficacy varies greatly depending on the type of blemish as well as individual differences in operation. Because there exist many different types of spots, such as nose freckles, cheek brownish nevus, melasma, and nevus of Ota. Due to the different types, the efficacy is totally different. Laser treatment for freckles is more effective, the effect of removing brownish nevus on cheek is better in some patients, or the effect of removing melasma is not good, so it is not possible to generalize and there is a great difference in each individual. When doing blemish removal treatment, patients need to be evaluated by the doctor for the type of blemish and choose the appropriate treatment. There is variability in each individual and the patient should let the doctor assess whether there are problems such as poor metabolism. Some patients have a post-inflammatory hyperpigmentation physique and have a particularly poor metabolism, so a scientific evaluation is needed.