Embarrassed by Age Spots? Let us give you a Hand! Age Spots (or Liver Spots) are the blemishes on the skin, which occur most frequently on the back, shoulder, hands, and face of the people. There are many factors that lead to age spots in people over the age of 40, but the common ones include overexposure to UV rays, increasing age, genetics and smoking. According to the American Academy of Dermatology, age spots are most often formed due to prolonged exposure to the sun. This exposure causes deposits of melanin (pigment) under the skin. Other causes of age spots include lack of exercise, unhealthy diet, consumption of stale oils and faulty liver functions. Overexposure to ultraviolet rays from tanning beds can also result in these spots, making it imperative to take extra precaution while getting yourself that tan, naturally or unnaturally.