I am starting to hurt under my armpits if you would call it that. Except, it isn t under my arm, its close to my back, and when I lift my arms up, it hurts, why? I put my hand under my arm and lifted it till I felt the pain to see where it was coming from, and its a little under my armpits and kind of my sides and back. Also, my throat hurts a bit when I swallow and when I walk, my right legs hurts and I end up limping a bit. I went to the doctors recently and they couldn t find the problem. They tested for Mono, they took blood tests, and they tested for strep, It was all negative. My right armpit hurts more then my left, please help, its almost Christmas and my birthday :(