Had an episode of stabbing spasmodic pain radiating like a whip effect from lower back curving around left rib cage withstand pain under left breast?
Check heart first. Once you are sure it is not your heart, you may have a pinched nerve in your back or nerve irritation under one of your ribs (intercostal neuralgia). Consider stretching, manipulation, physical therapy, or intercostal nerve blocks. Also be sure you have an up to date breast exam to be safe and again, make sure its not your heart!
Burning, stabbing pain behind left breast, in left rib cage, upper left back. Over a week now. Slightly worse when I inhale.
Examination. It sounds like rib pain, but you should get an examination for final determination. A Doctor of Osteopathic medicine or Chiropractic medicine can diagnose and treat that condition.