Uneven skin-tone is not a problem occurring only on the face.  Skin-tone differences on other areas of the human body are also common.  On the arms, the inner arm is usually lighter than the forearm.  The chest and abdominal area of the body is lighter and easily distinguishable from other parts of the body like the legs which are exposed to more sunlight.  Areas of the body exposed to more sunlight naturally appear darker, and are more prone to discoloration.  Darker skin on the neck can ind...
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