I feel slight pain under left jawline only when I touch it, upon tilting my head backwards I could feel something swollen and painful to touch, its movable, it has been there for a while but no other symptom. Is it a swollen lymph node? Should I be worried? It feel like a small moveable knot and mostly I forget its there until I start touching it then it causes pain. I am worried if its serious. Please advise. Thanx.