My wife noticed I have swelling on me left side about 3" below my armpit. After examination there is a lump there. I have noticed pain there frequently the last few days but thought I might be passing another kidney stone as I pass them often. However, I have never had any swelling or lump like this before. Any suggestions. She also said it looked slightly dis colored to her. I can't think of anything I've done to hurt that area since I am disabled and bed bound most of the day. Thank you.