

Pulled muscle or costochondritis?
Awful tenderness/achiness and a gnawing soreness in the red areas. Wraps around left upper torso. Pain is worse when I lean forward/slouch. VERY tender under left ribcage and left mid back. Constant ache, no sharp pain. Hard to get comfortable. Alternating heat/ice with little relief. The pain gets better when I lie flat on my stomach and slightly extend/arch my back. 39 female. No shortness or breath or any cardiac symptoms.