I've got FBS, so perhaps my experience can help here. I had a sympathetic chain schwannoma (sp?) removed from the left side of my neck in April of 2006. Within a week I developed intense pain in the left parotid region any time I ate anything. Drinking water or coffee causes no pain. Citrus drinks are brutal, as is wine. Beer causes no pain. In my case, it lasted for most of the meal. I've tried gabapentin, but it made me forgetful, even with titration so I stopped it. I also tried acupuncture, to no avail. After 18 months, it seems to be starting to subside slightly, but it's hard to tell if I'm just getting used to it. Great for weight control, except I'm not overweight. What works? Sometimes it helps to massage that area while eating. Sometimes it helps to bite down hard on that side. Vodka works wonders - a good martini before a special meal makes a huge difference. 750 mG of Vicodin also seems to help, taken an hour before a meal, but I have the self control to limit this to once or twice a week maximum. I could see this being a problem for others. Please take this seriously, it's a truly debilitating syndrome. Good luck with your patient.