Deoc

I can relate to your sister's trismus. I am still fighting it five years later. The Therabite does help but at first it was so painful that I had my radiologist prescribe me some Percocet to take to do the exercises.
My speech therapist (SLP) worked with me on the Therabite during our sessions, showing me how to position it and watch me practice. I had to get a prescription from my ENT for the speech therapy and then I called around to find a SLP who was familiar with Therabite.
I hope this helps
Charm