<s>[INST] I am 55 years old and been having pain under my armpit and above my left breast and in the shoulder blade area. I have had yearly mamo. and in may an ultrasounnd of the left breast Nothimg was found but the pain seems to be getting worse. Any suggestions. [/INST] Hello, Your symptoms could be related to a cervical or thoracic disc herniation, which is causing articular nerve pain in this region. Another possible cause to consider would be the heart. For this reason, I would recommend consulting with your attending physician and performing some tests:- A resting ECG- A chest X-Ray study- A cervical and thoracic spine X-ray study, followed by an MRI if necessary. An exercise cardiac stress test would help to definitely exclude any possible cardiac disorders. Hope I have answered your query. Let me know if I can assist you further.  </s>