Wrinkles that occur in facial skin have a lot of causes. They are just a part of aging in most cases. Skin that loses fat, elastin and collagen can also be a result of over exposure to the sun or repetitive facial gestures. Also, the skin will lose its ability to seal in moisture and the result of this is dry, shriveled looking skin because of dead skin cells. Underlying facial muscles can be forced to lay in a position they have been trained to over time and cause smile lines, frown lines, eyebrow lines and forehead lines. Crow’s feet lines may also start to appear.