Normal skin contains cells called melanocytes that produce the brown skin-coloring pigment melanin.  There are several conditions in which melanocytes are either abnormal or abnormally distributed.  A pale area of the skin is the result of fewer or less active melanocytes than usual, whereas a darker area (or area that tans more easily) indicates more numerous or more active melanocytes. 

Sometimes mistaken for a suntan, bronzing of the skin often develops starting at pressure points such as elbows, knuckles, and knees and spreading from there.  It is also seen in the creases of the feet and the palms of the hands.  The bronze color can range from light to dark (in fair skinned people) with the intensity often a function of the underlying cause. 

Hyperpigmentation is treated by performing Photorejuvenation with an Intense Pulsed Light.  Normally there are approximately 5 - 7 treatments.