Benign side effects are very well-localized, reversible and self-confined difficulties which build within just a couple of days from the injection, and they usually disappear with none treatment. The aesthetic and practical adverse effects are associated with different muscle responses to botulinum toxin or with misplacement of botulinum toxin. https://botulinumtoxins52840.wikigop.com/1436184/botulinum_toxins_an_overview