Dark moles, also called pigmented moles, nevi, nevus cell nevus, etc., occur on various parts of the body surface, some on the face and some on the trunk and extremities. A nevus does not have any symptoms, that is, it does not feel painful or itchy. Once a nevus becomes itchy, especially if it is repeatedly itchy and uncomfortable, it is important to be alerted. It is not recommended to use drugs to stop itching at this time, and it is recommended to remove the nevus and do histopathological examination after finding itchy nevus, especially if it itches repeatedly, to avoid the transformation of the nevus to a bad direction.