Hi ODog,
I'm the girl from the forum you linked. Unfortunately, at 2.5 years post-op, I'm still very very bothered the tightness and pain in my chin and lip. It is exactly as you have described, very uncomfortable pulling and stiffness, and causes my lips to look very off and crooked when I speak. I'm still consulting with surgeons to see what can be done to correct this, because as you can imagine, it has very negatively impacted my life. My whole surgery was a disaster but this is my biggest functional complaint. I really regret it and wish I could have foregone the genioplasty, there was really no point in having it.
I have found ways to manage it a bit better, such as taping the area or pulling a piece of hair tie between my gums, but the best method is simply not talking which is very depressing and of course not worth the surgery IMO. Let me know if you would like to connect as we work through this.
I've tried botox with no success, so my next step is hardware removal/resuturing.
Is your tightness on one side or both?