Moles at the corners of the mouth usually do not require treatment, if they are accompanied by symptoms suspected to be malignant, such as enlargement of the area and itching, then they need to be treated. If the mole at the corner of the mouth does not have any reaction and its does not affect the appearance, you can choose not to treat it. However, if it seriously affects the appearance, it can be treated by laser or surgery. If the mole on the mouth has a tendency to expand rapidly in a short period of time, or there is ulceration, satellite moles appearing around it, accompanied by itching or pain, etc., deterioration of the mole is not ruled out, so try to choose surgical excision and then carry out pathological examination. It is suggested that people with moles at the corners of the mouth should go to regular hospitals for consultation and clear diagnosis. If treatment is needed, standardized treatment should be carried out under the guidance of doctors.