An actinic keratosis is a rough scale or horn-like patch found typically on sun-exposed areas of the skin.  Actinics are the result of sun damage and may progress to a squamous cell cancer.  Treatments for actinic keratoses include freezing and desiccation, topical prescription medications (such as Aldara or Carac), or surgical removal.  A relatively new treatment to treat multiple actinic is photodynamic “blue light” therapy.  Seborrheic keratoses are “stuck-on” wax-like appearing skin growths occurring primarily on the trunk.  They are not cancerous but may be removed due to appearance or irritation with bleeding.