Most of the pigmented nevi do not need special treatment, but if it affects the aesthetics and the patient has the will to be treated, then the pigmented nevus can be removed by laser, freezing or surgical methods, the specific methods are as follows: 1. Laser treatment: if the diameter of the pigmented nevus is less than 5cm, it can be treated with laser treatment, which mainly includes YAG laser, carbon dioxide laser and so on and is suitable for smaller pigmented nevus, and the patient needs to be evaluated by the doctor before the laser operation. Before laser operation, the doctor should assess the patient’s specific condition, and this treatment method is forbidden for people with scarred body. For larger nevus, the effect of laser treatment is not obvious; 2. Freezing treatment: the surface of nevus is frozen, and after the treatment, it is necessary to pay attention to the postoperative sun protection, and keep the wound surface clean and dry, to prevent the formation of keloid; 3. Surgical excision: if the diameter of nevus is more than 5cm, it is usually surgically excised in the outpatient clinic, and the area around the lesion will be anesthetized locally, and the nevus will be excised, and if necessary, it will also be excised appropriately. Excision, if necessary, will also be appropriate to excise the edge of healthy skin, but need to pay attention to the surgical treatment may leave a certain degree of scarring, if the lesion range is large, may need to be excised in stages. After the appropriate treatment, patients should pay attention not to scratch the affected area with their hands, and if malignant tendency is suspected, they should follow the doctor’s instructions for regular review.