Hi, I have this discomfort feeling such as extreme tenderness, pain and slight puffiness at the top of my upper left abdomen (rib cage), located underneath my left breast. I ve felt this a slight tenderness a couple of weeks ago. Now it s gotten a lot worse. In the past I have had problems in the past with Gastritis. The past few days, I ve currently have a tightness in my chest followed by a nauseating, fullness feeling on top of the tenderness and slight swelling on my upper abdomen. Does anything come to mind with these symptoms?