The older you get, the more sensitive your skin becomes to outside factors, and the weaker your body is to protect it. The following can affect your skin quite drastically: Fat loss Gravity Decline in collagen Exposure to the elements Sun, rain, wind, in addition to collagen decline, can lead to a lack of tone and firmness in your skin. Because your face is arguably the most systematically exposed area of your body, you start noticing changes there first.