Pain On Left Side Under Breast Radiating To Back. It causes mid left upper abdominal pain that can radiate to your back. Can cause what you are describing one really needs t.
While your heart is under your left rib cage feeling pain in that area usually. The muscles that are located between the ribs. Another possible cause could be a strain to one of the intercostalis muscles.
Epigastric pain radiating to back.
Find useful information in these links. Acute pancreatitis comes on suddenly and can also cause. This could cause radiating pain into the front breast area. It can be intense.