for the past year, i have noticed swelling and pain in side neck under jaw. i now have difficulty swallowing and full feeling in ears.i also have a hoarse voice at times. I have had previous surgery(4 yrs ago) to remove green field filter which had perforated the vena cava. Also have damaged Phrenic nerve from previous heart surgery. What could be causing my symtoms? Could they be related to my previous surgeries? i am a 40 year old female around 11 stone in weight, 5 ft 6 n height.