I had a pain in my armpit a few months ago. I could feel what felt like a "skin tag," but it seemed to be rooted in a painful "lump." Anyway, I asked my dermatologist to remove the skin tag and a few weeks later the painful lump disappeared. I'm not quite sure if the lump was part of the skin tag, or if the lump simply increased the chances of a skin tag developing. I've had various lumps (some painful, others not) come and go in my armpits since ME began. Might be coincidence, but I never noticed them before that.