It is called round moss, which belongs to skin moss, because it is round and will spread outward. Earthwork is to cut the simmered ginger and rub the affected area with the cut mouth. Of course, you can also buy medicine under the guidance of a doctor: there is always ash in the country, and things are thrown into the ash, and it continues to burn firewood on it. Burning things with heated ashes is called simmering. You can stew sweet potatoes and eggs, which means there is no firewood.