Surgical removal of moles usually requires pathology in order to distinguish between benign and malignant to exclude the risk of deterioration. 1. Moles are usually caused by the increase of factor melanocytes, patients can go to the hospital for treatment by laser or surgical excision, after laser or surgery, it is recommended to do routine pathological examination to exclude the risk of malignancy. 2. If a mole suddenly increases in size, irregular shape, uneven distribution of pigment, ulceration on the surface and the appearance of new moles around it within a short period of time, it may be a symptom of malignant transformation, and a part of the mole needs to be removed immediately for biopsy and pathology examination. When the above changes occur in a mole, patients are advised to go to the hospital immediately for biopsy and pathology examination, and under the guidance of a doctor for treatment.