I found a hard lump under my left ribcage after doing some strenuous workouts that forced my back to be in a weird position. These workouts were the perfect pushup and regular pullups. However the lump is there and is located where the abs meet the rib cage at the upside down V area. i can see it if I flex my abs in the mirror and it feels hard and movable kind of like cartilage. It doesnt hurt but it does feel uneasy in that area, but i think that is because i keep thinking about it. I thought it might be and extra rib at first but it is too moveable to and too much to the side for that I think. I hope this is workout relate. I have lost 110 pounds over the past 2 years, and i rarely search for lumps so there is no knowing how long it has been there for. I hope it is something that is benign but of course, me being a hypochondriac I think its cancer or something. Can anyone give me insight as to what this might be as I am very worrited and I can't stop thinking about it. I have had lumps before on random parts of my body including middle of my chest and back of neck, but they have come and gone. So i am hoping this is one of those. Thanks for the time and help and any feedback is greatly appreciated.