Moles can be removed, usually with laser or high frequency ionization, but care must be taken not to get water on the area after removal to avoid infection. They usually occur in the upper face of the eyes, neck, armpits, and groin, and are usually small, protruding superfluous organisms. Usually, the surface will scab over within a week and then fall off on its own. However, since the cause of the development is not clear, recurrence may occur after treatment. After the occurrence of a nevus, patients are advised to avoid repeated stimulation of the nevus, as this can cause a sudden change in the nevus. If the nevus changes within a short period of time, it is necessary to promptly visit the dermatology department of the hospital.