For many of us, wrinkles are just a sign that we are getting older. However, according to Web MD, there are other contributors as well. Those deep “11” wrinkles that form on your forehead and the branch-like creases near the eyes become more prominent by habitual muscle contractions. Smiling, frowning, and squinting can make them more noticeable. Other things such as sun exposure, skin care, and heredity can also play a role in development.