When botulinum toxin is injected into the muscle, it helps the muscle to relax. Botulinum injection into the upper side of the trapezius serves both therapeutic and cosmetic purposes. Modern sedentary life unavoidably causes chronic muscle spasm of the trapezius muscle, resulting in a chronic pain in the shoulders and neck. Botulinum relaxes the muscles and eliminates chronic pain, as well as making a smoother shoulder line. As a result, the treatment can improve the appearance of the neck and shoulder.