I'm having pain medial to my shoulder blade. not onset by exercise and no pain when performing rotator cuff motion. what's hurt? how can i stretch it?

Sounds like: the SUBSCAPULARIS....is strained and I would apply heat and take anti-inflammatory medication (eg OTC IBUPROFEN) and NOT STRETCH in fact these muscles whivh "hold the scapula /shoulder blade to the chest wall NEED REST when strained! Hope this is helpful Dr Z

Varies: There are a number of potential causes of pain in that area and treatment varies based upon the cause. Among the more common causes are a strain to the rhomboid muscles that insert on the medial border of the scapula, the development of a subscapular bursitis, or the development of a thoracic radiculopathy among other possibilities. An exam would likely lead to the correct diagnosis.