My left breast is paining and it feels as if i have lumps in it my left armpit is also paining it started 2weeks ago?

Doctor can examine: A primary care doctor can check the whole area of the chest, armpit, back, and breast, to see if there is a problem in that area that is causing soreness to the armpit, such as an infection. Sometimes pain sensations in one problem area travel to other nerves, and make a person "feel" the pain in another part of the body. For a man, breast cancer is less likely than in a woman.