One very common sign of aging is the age spot. Age spots are also known by many as sunspots, liver spots, lentigos, or lentigines. Age spots are flat, tan, brown, or black in color and appear on areas of the skin that have been exposed to sun. As we age, sunspots appear on the backs of our hands, our forearms, our neck, chest, and face. The pigment-producing cells in the skin are activated to produce more pigment by ultraviolet rays. While these spots are not cancerous, patients may be at risk for developing skin cancer if they have age spots.