Last night i noticed i had developed a lump below my ear right under my jaw bone... It is causin me moderate pain and seems to be growing. I have hypothyroidism, could this be related to that? This is on the left side of my neck. The pain seems to intensify when i lift up my head, move my jaw or turn my head. The pain from it goes thru out my left side of my neck up into my head. When i breathe it almost feels like a pressure from the lump... Is this something i should be concerned about? Im driving myself crazy with worry.