The risks of not removing a skin lesion can depend on the type of lesion. Some lesions, such as skin cancers, can grow and spread if not treated, posing a serious health risk. Other types of lesions, such as moles or benign skin growths, may not pose immediate health risks, but they can cause discomfort or be a cosmetic concern. It’s always best to discuss the risks and benefits with your surgeon to make an informed decision.