Hi all I just been to the doctor today. Because I got big lump under my left armpit. I have it for quite sometimes now and it hurts so bad spececially when you touch it. My left shoulder blade is very sentitive to touch as well.  I been going to the chiropractor for car accident all he does is adjust my nect, back and shoulder but he  does not do  anything about my lump under my armpit. So finally, I told my family practice  doctor and she sent me to the orthopedic institute. The Dr. from Orthopedic sending to get MRI. I'll keep you post it.