No treatment of<unk>  is necessary, except for aesthetic reasons. Generally, lesions can be treated with electrodesiccation and curettage, or cryosurgery. When correctly performed, removal of<unk>  will not cause much visible scarring.
Seborrheic keratosis
Basal-cell carcinoma
Hydrocarbon keratosis
Melanoma
Arsenical keratosis
Wart
Actinic keratosis
Reactional keratosis