One year ago, I had a round chin injection and Botox for a square jaw. When I got Botox for my square jaw, I had severe bruising.. The hospital said it was sorry. At first, it was stiff and I didn't feel any difference. It started appearing little by little after 3-4 weeks . The jaw muscles are not coming out, and the contour line is also established. It would be good if it was permanent, but I am satisfied =)