Pain in left lower jaw below tooth no 7 and 8, since last approx 1.5 year. Tooth 8 extracted from here 1 year back but pain still exists. Shown to 3 doctors in last 1 month, they took x-rays and found no problem with teeth. Docs not sure with the reason of pain, one doc, who extracted tooth 8, suggested pain could be because of swelling in joint on left side, swelling could have come due to jaw rubbing during scary dreams in night or tension, or excess mouth opening during tooth extraction