The lines that appear between your brows - glabellar lines actually result from muscle movement and the passage of time. You may have heard the expression "to wear your emotions on your sleeve," but in reality you wear them on your face. If you're angry or annoyed, for example, you knit your brows together. Underneath your skin, your facial muscles contract, cause a pleating of the overlying skin, and then others can tell that you're frowning.

After years of crinkling and wrinkling, those glabellar lines start to linger longer and can become more pronounced. For women, whose faces are usually more animated than men's, and whose skin is oftentimes more delicate, these lines may appear exaggerated and more permanent.

Botox® is a popular non-surgical injection that temporarily reduces or eliminates frown lines, forehead creases, crows feet near the eyes and thick bands in the neck. The toxin blocks the nerve impulses, temporarily paralyzing the muscles that cause wrinkles while giving the skin a smoother, more refreshed appearance. Studies have also suggested that Botox is effective in relieving migraine headaches, excessive sweating and muscle spasms in the neck and eyes.