How do frequent weight fluctuations affect my skin?For those like me, who are up and down, it does have a negative effect on the skin which relates specifically to elasticity of the skin. Similar to a rubber band, when the skin is stretched out regularly, it will bounce back, but as you get older, the elasticity weakens. So the idea of expanding, constricting, expanding, and constricting the skin over and over will take its toll on your skin’s elasticity which will encourage looser, less-firm skin.