The chin muscles didn't look more prominent than others, but when I bit into the hem, it was so hard that I got botox on my chin! I saw the effect very well. Looking at the face shape before and after the Botox treatment, the chin became slimmer even after only one treatment. + I went with a friend and got fit, but my friend has a square jaw, so I got hit twice, and the square jaw has decreased a lot compared to before.