I am planning to get chin Botox again after about 2 years. The bulking up of my masticatory muscles has improved haha.. I am planning to take it again before studying abroad. The last procedure was Innotox at Gangnam ㅌㅅㅇㅍ, and I looked into it and found that there are hospitals that perform the procedure using ultrasound. Is this a procedure that requires an ultrasound? I wonder if this is for marketing purposes, so if there are any people who have undergone ultrasound procedures or feel that ultrasound is not necessary, please give your opinion :)