I've thought of another explanation for the pain. I've had a tightness on both sides of my throat Radiation ended. It was clearly more noticeable during a yawn. On September 7th I had an Endoscopy performed to biopsy esophagus. They put me out to perform this.
I suspect that the use of the apparatus to jack my mouth open, likely ignored the tightness and ripped scarring tissue. It was within a 1-3 days that this pain started.
Squamous Cell Carcinoma base of tongue Erbitux 12 wks IMRT Radiation ended 8/7/12 MRI Cancer live 10/3/12 3 rounds Chemo (Cisplatin, 5FU, ??) Brachytherapy 7days ended 1/28/13 PET SCAN 4/19/13 70 yr old 8/20/12 Walt