For the past several years I have been having a sharp, sudden onset, stabbing pain right under my
xiphoid process. The pain radiates around my lower rib margin, into my back, and
at about my 12th thoracic vetebrae. When the pain is radiating to my back it's a sharp tightening pain, almost like my muscle is tightening or spasm pain. I will try and extend my back and stretch to relieve the pain, but as soon as I relax from the stretch it's as though the pain gets worse.