Age spots, also called liver spots and solar lentigines, are small dark areas on your skin and are most common for adults over 40. They vary in size and usually appear on the face, hands, shoulders. Age spots typically result from prolonged exposure to ultraviolet light. They are usually the product of sun exposure, but tanning beds and other tanning equipment may also contribute to their development. By definition, age spots are not cancerous and present no physical health problems, but they can be a cosmetic concern.