There's a homoepathic remedy called Rad Br which is given to patients who've had problems since receiving radiation treatment. Amongst its treatable symptoms lists Dry mouth and Aching of the jaw. It doesn't mention growths but it's worth a try at only £5 or so. Brief information is on this site. ...

Since having radiation therapy for tonsil cancer eighteen months ago, this reader’s sister has experienced troubling side effects.  She is no longer able to produce saliva and she keeps developing growths on her jaw, which cause a tremendous amount of pain.  In the last six months, three growths have been removed but tests have ...