Botox is a highly purified protein that prevents unwanted muscle contraction. Many people subconsciously furrow their brow, especially when they are tense, which results in facial wrinkling. Crow’s feet at the corners of the eyes and forehead creases are other examples of this type of wrinkling. Working by minimizing unwanted nerve signals for a muscle to contract, Botox can be compared to a cut-off switch between an electrical cord and a lamp. Electrical energy must reach the lamp for the light to turn on just as a nerve signal must reach a muscle for it to contract. Botox minimizes the wrinkling effects of these muscles, thereby giving the skin a smoother and more youthful appearance.