Hi, I'm 29 yrs old, and I have been having underarm pain. It started in the outer right side of my right breast, moved up to the top part above my breast, as well as my right armpit. That's where the pain has persisted for the last 2 weeks. Some days it's a constant dull pain. No throbbing, never sharp, just a dull pain. But for the last few days it's been on and off, not constant. The pain was localized but this evening it has now added the left armpit. Same pain. Seen two doctors, one said tendenitis, the other collected bloodwork and sent me to an ultrasound. Bloodwork came back fine. Yet to receive results of the ultrasound. Could it be an infection? Would infection go from one armpit to another? There is numbness in the area of the armpit that feels the pain. No round ball or anything. But there is swelling. Not sure of what is going on. Looking for someone with similar symptoms, or with some direction of just what may be going on in there. Do not have anxiety or have any paranoia as to what is going on. Just very concerned as to what it may be. If anyone could give me some direction, I would really appreciate it. Thanks.