Sun spots occur mainly due to excessive exposure to ultra- violet radiations originating from the sun. It is a known fact that “Melanin Pigment” of your skin is responsible for the absorption of sunlight. It also protects you from harmful Ultra violet rays. However, as you age your skins natural ability to deflect UV-radiations begins to reduce, thereby, causing sun spots. These are usually brown in color. Biological terms used for sun spots are Liver spots or solar lentigo. As age factor is responsible for their occurrence, so they are called age spots.