What you will notice

Days three to seven: the treated muscle feels weaker and the line starts to soften, and this is the first real sign. Weeks one to two: the full effect is in, the crease at rest looks shallower, and if the amount was judged well the face still moves naturally. Weeks four to eight: this is the settled plateau, and for the jaw it is where the muscle visibly slims as it is used less. Months three to four: movement returns and the lines come back, which is the signal for the next session, and in the masseter the shaping can hold for six to twelve months. Over years of repeat sessions the resting line often sets less deeply than it would have, because it has been folded far fewer times.