The other night I was experiencing some pain in my left rib cage. The pain stopped, then it felt like something was moving between my skin and my rib cage. Next thing there was a lump, feels almost like an oyster. It has been four days and it is significantly bigger and is now under my right breast and on the center part of my rib cage.
Although there is no pain, it is extremely uncomfortable. I have to stretch my upper body to sit comfortably.
Any ideas? Thanks so much.