Due to repetitive facial expressions, dynamic wrinkles like frown lines, crow’s feet, forehead lines etc. are formed. For example, you knit your brows together, when angry or annoyed. When facial muscles contract underneath the skin, it causes a pleating of the overlying skin, which appears to others as you're frowning. As time passes such repetitive expressions make the lines linger longer and they become more pronounced. For females who are more expressive and have a more delicate skin, the crinkling and wrinkling becomes more exaggerated and more permanent. Treatment with BOTOX will relax these muscles causing wrinkles and in turn it will soften moderate to severe wrinkles dramatically. And hence dramatic improvements can be seen in these wrinkles. This is done without detracting from your facial expressiveness.