Armpit pain can have many causes, ranging from injuries and irritants to infections that cause swollen lymph nodes. Less commonly, the pain—referred to as axillary pain—may be due to an ...

Usually, these lymph nodes are located in the “ axilla ” (under the armpit), but there are also clusters of lymph nodes near the breastbone (sternum). The ones that are closest to your breast ...

or axillary, lymph node removal surgery. The surgery is performed if tests show that the cancer has spread from the breast tissue to the lymph nodes and is often followed by radiation treatment.