I am waiting for my doc to call back, but i thought i may get some advice here. I was putting deoderant on earlier this week and felt this sharp pain from my right armpit down to almost my elbow, on the inner part of my arm....It burned and radiated for awhile. I felt around and could not find a lump, but since then It has happened in different situations. As i am writing this I feel a pinching sensation under my arm and down my arm.... I felt a dull pain in the right side of my r breast.....any idea????