Because the treatment of complex melanocytic nevus will involve dermatology, plastic surgery, special examination and radiology, beauty seekers should be careful when choosing hospitals and doctors. For some melanocytic nevus with beautiful facial effect, laser can be used for treatment, which is convenient and effective. If the nevus of waist melanocytic nevus is often rubbed and squeezed by his belt, it should be completely removed as soon as possible to prevent malignant transformation. The specimens taken out should be sent for pathological examination. If there is malignant transformation, it should be completely removed and skin grafted.