Not sure if this is in the area you’re feeling, but we’ve had a few members diagnosed with Pterygoid hamulus issues, here’s a link:
Pterygoid hamulus - Structure, Location, Function, Diagram (anatomy.co.uk)
And here’s a discussion about other bony growths in the mouth, it seems to be quite common with ES to get over calcification/ bone spurs in other areas:
Eagle Syndrome as well as other bone abnormalities - General / Eagle Syndrome Stories - Living with Eagle
It could otherwise be the stylo-mandibular ligament calcifying as well, I think some members have had this although not very common.