Melanin is what gives our skin its color. Pigmented lesions are dark in color simply because melanin is abnormally concentrated in one area of the skin. High concentrations of melanin can be due to various factors. Some types are present at birth, but most occur with age or as a result of overexposure to the sun’s damaging rays. Lentigenies or age spots are ageing brown marks, which appear on the backs of hands and the face. Sunburn freckles are the result of sun damage .