If a nevus is surgically removed, it needs to be slightly enlarged intraoperatively by making an incision in the normal skin at the edge of the nevus to remove it. Then the specimen will be sent to pathology after surgery, and pathological examination can determine whether the cut edge is clean and whether there is any residue. According to the above two articles, recurrence of nevus rarely occurs after excision. In rare cases nevus recurs locally after excision, further surgical excision can be done. If a nevus is repeatedly excised, it will not become malignant, because surgery is only physical stimulation, and if excision is used, even if local residue remains, it will not lead to nevus malignancy, unlike laser or chemical nevus spotting, which is chemical stimulation and can easily lead to nevus malignancy.