What causes pain and swelling in the armpit?
Patient: Hi, My left armpit is swollen and has what looks like slight bruising. It s very painful and is getting worse. Showed it to a doctor and he said that I stressed a muscle. It s hurt much more since he pressed on it a week ago. No lumps in my breasts but there is a history of cancer in my family. The back of my neck and upper back spontaneously broke out in pimples as well. My father worked with agent orange before I was conceived. Any thoughts? I m a 34 year old female. Otherwise healthy. Doctor: Hi, I had gone through your question and understand your concerns.Hi, If I were your treating Doctor for this case , I would come up with three possibilities, these include: -axillary lymphadenopathy(enlarged lymph nodes) and this could be caused by any infection in the surrounding area and arm or any lesion in the breast(EXCLUDED BY  BREAST MAMMOGRAPHY).-Muscle swelling for any muscles of axillary walls and this could be treated by anti-inflammatory medications and NSAID.