What causes wrinkles and how does Botulinum Toxin help?

Repetitive facial expressions cause the tiny muscles under the skin to contract, gradually creating wrinkles. When injected directly into these muscles, Botulinum Toxin (Botox) stops nerve impulses reaching the area and causing further contractions. The muscle relaxes, which smoothes the skin covering the muscle. In some cases, with repeated treatments, the wrinkle can actually disappear. The effects of Botox are restricted to the treatment areas and do not travel throughout the body or to neighbouring areas around the injection site.