Botulinum toxin is a substance that produces muscle paralysis, decreasing or disappearing in some cases thus wrinkles at the face and neck. It also improves the surface characteristics of the skin. In addition to aesthetic purposes, it can also be applied to patients with facial paralysis asymmetries, and can be an adjunct to laser therapy and placement of hyaluronic acid. Another use of botulinum toxin, is to treat patients with excessive sweating level of hands or feet (hyperhidrosis) This procedure is not required local anesthesia.