Hi, Im a 30yr old woman. I have had a lump behind my left ear for around the last six months. The lump is not painful, but is now approximately 1.5 - 2cms in size. The glands in my neck on this side are also prominent. Aside from this I have a reoccuring pain in my left arm, stemming from my shoulder down and discomfort in my stomach, along my ribs on the left side and down into my lower back. Would you have any advise for me please? Thanks