The skin also becomes thinner and dryer and all these factors contribute to wrinkling. Prolonged exposure to the sun also causes wrinkling. This is why people who work outdoors tend to get wrinkles earlier than those who spend most of their lives indoors. The ultra-violet component in sunlight speeds up the chemical changes in the skin that cause wrinkling. Exposed areas of the body such as the face, neck and backs of the hands thus have more wrinkles than areas which are normally protected by clothings.
Facial expression is another factor.
Whenever we smile, grimace or frown, furrows are formed in the skin, depending on which facial muscles are being used. Over the years, these facial lines become ingrained so that they are visible even when we are not expressing any emotion. The effects of ageing cannot be put off forever, but the development of wrinkles can be delayed to a certain extent if one is careful. It is best to avoid prolonged exposure to hot sunlight. A dry skin also develops more wrinkles than an oily skin, so using a moisturising cream can help.