For several years I have had a feeling of swelling or pressure under and in my lower left teeth. I had root canals and finally extractions in teeth 20 and 19.
I've finally figured out that what helps me most is to drink thru a straw and have all food and drinks lukewarm. I avoid sweets, acidic foods, salty foods, mouthwashes and most toothpastes because they intensify the pressure for hours. My mouths feels best when I get up in the morning before I eat or drink. Twice I've had an area down low behind 2 of the other teeth get very sore and tender to the touch but it disappears in a day or two.
I cannot replace the missing teeth because any rubbing or touching of the gum intensifies the feelings of pressure. Nothing ever shows up on the X-rays and my dentist told me I don't have a dental problem that he can see. My ENT and a pain doctor have been treating it as a nerve problem with drugs as the only option. I would like more tests--what should I ask for ...Visitor from Alaska
This is a difficult problem that you are presenting with. You may consider that there is a neroma in the area which may cause this pain.
Steroid injection in the site may be of some help. A biopsy may also give some additional insight to the problem, however does present the possibility of the condition intensifying.