I am not sure if this is dental related or perhaps a swollen lymph node or gland? Yesterday I brushed against the underside of my jawline while washing my face (right where the nearly 90 degree angle of the jawline is) and it was tender to the touch. When I press on it now it is very tender, almost like a swollen lymph node would be. I don't have any pain in my teeth, nor does it hurt when I chew or otherwise and the pain seems only to be on the underside of the jawbone area when I press on it.
What could this be?