I have tooth sensitivity in my upper teeth in different parts depends on where the trigger point decided to be usually on the side near the front of mouth oral gel works using sensitive tooth paste but usually it means an attack is not to far behind my teeth will get sensitive about a week or two before a major attack or if I lower my meds. I take Gabapentin 2400mg a day and 900mg of oxcarazepine(Trileptal) I try to lower my meds when I think the attacks have gone away only to be remined that they have not. The tooth sensitivity is just one of the spot that is my trigger for my TN My triggers are on my face by nose around my eye my cheek, my forehead and in my mouth on the gum lines and teeth and some times the roof of my palet near the teeth so eating drinking and talking can cause those horrible electrical shocks the only choice is using straws but sometimes it hurts worse if I use straws drinking room temp drinks eating on only one side of mouth which sucks I know I love a good chocolate hersey bar but the sugar seems to set off the sensitivity and I get shocks or spicy foods , crunchy food stay away from any food or liquids that will excite or senses(nerves). Some times I just have to eat or swallow through the pain when it is really bad it takes all my strength and courage just to take my meds or even talk mine gets so bad I can not talk at times.My teeth always have this weird sensitive feeling all the time it sucks you may have to up your meds . Oral gel is my friend it may hurt when you putting it on but grin and bear it and it will numb your gums for a little while for a little bit of relief but it makes food taste nasty but you can atleast eat it. even helps it my gum lines are my trigers and any movement of my lips against my gums will set off shocks it will give me a little relief
Sorry if I have rambled it is the meds they make me a little loopy plus I had a glass of wine with dinner so I an even more loopy good luck I am not sure if I helped any.