These folks mentioned botox shots, physical therapy, and a procedure to cut the muscle (last resort I am sure...)

https://oralcancersupport.org/forums/ubbthreads.php/topics/183983/new-with-trismus#Post183983

Last edited by ChrisCQ; Yesterday at 06:05 PM. Reason: Somehow it pasted the same URL from the previous post again).
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