Reading Time: <1 minuteMany patients visit the dermatology department with ugly scars and pigmentation caused by low-temperature burns using liquid nitrogen as a treatment for moles (pigmented birthmarks). For warts (verruca vulgaris), treatment with liquid nitrogen is unavoidable (I am against it), but the treatment of using liquid nitrogen for the purpose of removing moles is a treatment that should never be performed, even in the Showa era, which was a shocking treatment. First of all, it is absolutely impossible to completely remove a mole (pigmented birthmark) by applying liquid nitrogen. It causes inflammation, and the skin around the mole will inevitably become red, swollen, and post-inflammatory pigmentation will occur due to inflammation caused by low-temperature burns. It seems that patients are largely unaware of these facts and the disadvantages of the treatment, and in many cases liquid nitrogen is applied to moles without any explanation. Moles are treated according to their condition, such as by excision or carbon dioxide laser electrolysis. Removing everything is a problem, but treating everything with liquid nitrogen is also a big problem. Even if it is performed under insurance, birthmarks should not be covered...