Indications for pigmented nevus surgery include: 1, special parts: end of limbs, soles of feet, palms of hands, lips and mouth, genitals and other friction-prone areas; 2, short-term increase in size: doubled within 6 months; 3, color change: uneven pigmentation or deepening and fading of color; 4, satellite foci around the primary rash: new pigmented nevus surrounds the primary nevus; 5, pseudo-footprinting of primary rash: the primary nevus The shape of the primary nevus becomes irregular and has roots to the surrounding; 6, ulceration or bleeding; 7, pain or itching and other self-conscious symptoms; 8, recurrence of the nevus after treatment of laser, freezing, medicine, etc.; 9, people who have serious psychological obstacles to the nevus; 10, people who have cosmetic demand for the area of the nevus.