Hidden pain in the location where the breast is connected to the armpit may be caused by enlarged lymph nodes, paratactic breasts or breast diseases, and the cause of the disease needs to be actively treated accordingly. Simple inflammation stimulation of axillary lymph nodes, pain, swelling, you can transfuse some antibiotics such as cephalosporin to reduce inflammation, too large lymph nodes need to be surgical treatment. If the breast cancer has metastasized to the lymph nodes, chemotherapy is needed to relieve it. Such as paclitaxel, vincristine, gemcitabine, cisplatin, carboplatin, capecitabine cyclophosphamide and other drugs. 3. The paratesticular breast also contains breast tissue, paratesticular hyperplasia will also make the breast and armpit connected to the location of hidden pain, you can take the prophylactic pills for symptomatic treatment. 4. Trauma such as excessive friction or squeezing of the breasts and armpits can also cause pain, so you need to change suitable clothes and apply erythromycin ointment to relieve the pain if there are wounds. 5. In addition to breast cancer metastasis to the armpit caused by pain, breast hyperplasia can also cause pain in this area, mild can be treated by massage to relieve pain, usually need to pay attention to light diet. So the symptoms of breast discomfort, to timely medical treatment.