Age spots are caused by overactive pigment cells. Ultraviolet light from the sun and commercial tanning lamps or beds speeds up the production of skin's melanin – the pigment which gives skin its color.

Age spots:

Are flat and oval shaped

Are typically tan to dark brown

Are found on skin which is most exposed to the sun

Range from freckle size up to 1/2 inch across

Can group together

Age spots don't require treatment. However, spots that are black or changing in appearance can be a sign of melanoma.